Revert "include/linux: move typdef for uintptr_t"

This reverts commit e8f954a756, which
causes compiling errors on 32-bit hosts.

Acked-by: Aneesh Bansal <aneesh.bansal@freescale.com>
Signed-off-by: York Sun <yorksun@freescale.com>

include/linux/types.h

@@ -124,7 +124,6 @@ typedef		__UINT64_TYPE__	u_int64_t;
 typedef		__INT64_TYPE__		int64_t;
 #endif
 
-typedef unsigned long uintptr_t;
 /*
  * Below are truly Linux-specific types that should never collide with
  * any application/library that wants linux/types.h.