BL31: Fix relocation error for PIE
BL31: Fix relocation error for PIE

This patch fixes BL31 linker error
 "relocation R_AARCH64_ABS32 against `a local symbol'
 can not be used when making a shared object"
when Position Independent Executable (PIE) support
is enabled with ENABLE_PIE=1 build option.

Change-Id: I2692269676db3f3b27eed499fc029fffb67969be
Signed-off-by: Alexei Fedorov <c822f9d283009ea22aff7123d9d948b6c6849e25@arm.com>

achingupta/arm-trusted-firmware,achingupta/arm-trusted-firmware