ARMV7: OMAP3: Convert setup_auxcr() to pure asm

This function consists entirely of inline asm statements, so writing
it directly in a .S file is simpler. Additionally, the inline asm is
not safe as is, since registers are not guaranteed to be preserved
between asm() statements.

Signed-off-by: Mans Rullgard <mans@mansr.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>