elog: Fix typecast issues related to 64-bit compilation.

BUG=chrome-os-partner:33764
BRANCH=None
TEST=Compiles successfully for ryu and nyan.

Change-Id: I036fd42d5cd4b71bcb68eea0fdd9a4e1aa4711e9
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 7c3db3d5c8
Original-Change-Id: I5e38966fe06aa3302a7c1b536f5ffd8bb22d4947
Original-Signed-off-by: Furquan Shaikh <furquan@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/229413
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Furquan Shaikh <furquan@chromium.org>
Original-Tested-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: http://review.coreboot.org/9424
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/drivers/elog/elog.c

@@ -108,7 +108,7 @@ static inline u32 elog_flash_address_to_offset(u8 *address)
 
 	return (u32)address - ((u32)~0UL - rom_size + 1);
 #else
-	return (u32)address;
+	return (u32)(uintptr_t)address;
 #endif
 }