include: sys: util_macro: add IS_BIT_MASK()/IS_SHIFTED_BIT_MASK()

Add IS_BIT_MASK() macro for determining whether a value is set bits
continuously from the LSB.
This macro is not dependent on bit-width and works in contrast to
BIT_MASK() and BIT64_MASK().
IS_SHIFTED_BIT_MASK() is a version of IS_BIT_MASK() that allows setting
the start bit of continuous bits.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>