makefile: vectorize for quadword registers
GCC does not support vectorization with varying vector sizes.
By default, it vectorizes for doubleword registers only.

Change-Id: I736e34e32ff105b23cdff1aaa8e3397c1ba72b8b
Makefile: restructre flag handling, also fix superset handling of a15 and armv7

Change-Id: Ie675d401de2196809756edfd67f19ef902e68af6
Signed-off-by: Dennis Rassmann <showp1984@gmail.com>
Makefile: unaligned access, should be default anyway

Change-Id: I0b4b734d396864d515a6ce1af01fdb2336d81d33
Signed-off-by: Dennis Rassmann <showp1984@gmail.com>