kconfig: Remove silentoldconfig from help and docs; fix kconfig/conf's help

                        your existing ./.config file and asking about

                        new config symbols.

     "make silentoldconfig"

                        Like above, but avoids cluttering the screen

                        with questions already answered.

                        Additionally updates the dependencies.

     "make olddefconfig"

                        Like above, but sets new symbols to their default

                        values without prompting.

nconfig: $(obj)/nconf

	$< $(silent) $(Kconfig)

# This has become an internal implementation detail and is now deprecated

# for external use.

silentoldconfig: $(obj)/conf

	$(Q)mkdir -p include/config include/generated

	$(Q)test -e include/generated/autoksyms.h || \

	@echo  '  oldconfig	  - Update current config utilising a provided .config as base'

	@echo  '  localmodconfig  - Update current config disabling modules not loaded'

	@echo  '  localyesconfig  - Update current config converting local mods to core'

	@echo  '  silentoldconfig - Same as oldconfig, but quietly, additionally update deps'

	@echo  '  defconfig	  - New config with default from ARCH supplied defconfig'

	@echo  '  savedefconfig   - Save current config as ./defconfig (minimal config)'

	@echo  '  allnoconfig	  - New config where all options are answered with no'

	@echo  '  alldefconfig    - New config with all symbols set to default'

	@echo  '  randconfig	  - New config with random answer to all options'

	@echo  '  listnewconfig   - List new options'

	@echo  '  olddefconfig	  - Same as silentoldconfig but sets new symbols to their'

	@echo  '                    default value'

	@echo  '  olddefconfig	  - Same as oldconfig but sets new symbols to their'

	@echo  '                    default value without prompting'

	@echo  '  kvmconfig	  - Enable additional options for kvm guest kernel support'

	@echo  '  xenconfig       - Enable additional options for xen dom0 and guest kernel support'

	@echo  '  tinyconfig	  - Configure the tiniest possible kernel'

	printf("  --listnewconfig         List new options\n");

	printf("  --oldaskconfig          Start a new configuration using a line-oriented program\n");

	printf("  --oldconfig             Update a configuration using a provided .config as base\n");

	printf("  --silentoldconfig       Same as oldconfig, but quietly, additionally update deps\n");

	printf("  --olddefconfig          Same as silentoldconfig but sets new symbols to their default value\n");

	printf("  --silentoldconfig       Similar to oldconfig but generates configuration in\n"

	       "                          include/{generated/,config/} (oldconfig used to be more verbose)\n");

	printf("  --olddefconfig          Same as oldconfig but sets new symbols to their default value\n");

	printf("  --oldnoconfig           An alias of olddefconfig\n");

	printf("  --defconfig <file>      New config with default defined in <file>\n");

	printf("  --savedefconfig <file>  Save the minimal current configuration to <file>\n");