Previously, the optimized asm option is only enabled when __ARM_ARCH_5E__ is defined, which is assigned in armv5te.mk rather than armv7-a series targets. This patch checks the ARM CPU feature about half-word multiply instructions to enable ARMv5TE resampler optimization routines properly. Change-Id: I4c5a5d8c932416f23bedb0b389db958349f21ea4