msm: remove include of <asm/mach-types.h> and <asm/system.h>

Upstream has removed <asm/system.h> so remove it from legacy uses.  As all
the platforms we support utilize device tree we no longer need to include
<asm/mach-types.h>.

Change-Id: I8e53b1fd96ad26711fae59f081a8892f8bb184b7
Signed-off-by: Kumar Gala <galak@codeaurora.org>