Support usage of __ARM_HAVE_LDREX_STREX

The __ARM_HAVE_LDREX_STREX define is used to replace
the swp instruction with ldrex/strex for ARM architecture
greater than 6 (armv6, armv7 etc.). However the include
file, cpu-features.h, which defines this flag was never
included.

Change-Id: Ia35e18e8b228ec830b2b42b08909515110753f18

Signed-off-by: Christian Bejram <christian.bejram@stericsson.com>
1 file changed