msm: pm-boot: Remove write boot vector function for 8625

Reorganisation of the idle-v7.S file makes pm-boot.c failed
for compilation. Hence removing the "msm_pm_write_boot_vector"
function to remove the compilation errors for 8625.

Change-Id: Ie8504c92092dac7b5967737956696a33ff84a330
Signed-off-by: Murali Nalajala <mnalajal@codeaurora.org>
1 file changed