MIPS: uasm: add a label variant of beq

This patch allows for use of the beq instruction with labels from uasm,
much as bne & others already do. It will be used by a subsequent patch.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>

diff --cc arch/mips/include/asm/uasm.h
Simple merge

diff --cc arch/mips/mm/uasm.c
Simple merge