altera_max10: support 'make flash' and 'make debug'

For both of these, we send the .elf binary over the JTAG and it gets
written directly into SRAM. The CPU boots the image from the entry
point (__start).

This does not provision the kernel onto device's User Flash Memory
(UFM). Implementation of this is still in progress see ZEP-273.

Change-Id: Iae8188a21e4a3eecfda0f4f0bb220c0607d719cb
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>