x86/platform/intel/mrst: Remove cast for kmalloc() return value

Signed-off-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Link: http://lkml.kernel.org/r/513EB5DA.2010300@cn.fujitsu.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>