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Enable TLS register by default for ARMv7a arch

Everything that is based on ARMv7a should have a cp15 TLS register.
Enable it by default so it's not accidentally missed in newer board
configurations. In fact, this could be enabled for ARMv6 as well, but we
currently don't distinguish between ARMv5 and ARMv6 in the build system.

This can still be disabled by setting it to "false" in the board
configuration, but this shouldn't ever be needed.

Change-Id: Ic2918f32899c8bcfa482f92c98f5a192fa318470
Add standard method for enabling mfpu and mcpu code optimization

Conflicts:
	core/combo/arch/arm/armv7-a-neon.mk
build: move bionic optimizations to NEON makefile

Change-Id: Idd495ddbb49f67fef5496456803263f8a23643c5

Conflicts:
	core/combo/arch/arm/armv7-a-neon.mk
Bionic optimization for Cortex A5

Change-Id: I06f29035fcfa2849b2d6f46dbfc7273312b1d136

Conflicts:
	core/combo/arch/arm/armv7-a-neon.mk