x86: minor pointer type cast in AMD microcode patch loader

Signed-off-by: Peter Oruba <peter.oruba@amd.com>
Cc: Peter Oruba <peter.oruba@amd.com>
Cc: Tigran Aivazian <tigran@aivazian.fsnet.co.uk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/microcode_amd.c

@@ -394,7 +394,8 @@ static int cpu_request_microcode_amd(int cpu)
 		return error;
 	}
 
-	buf_pos = buf = firmware->data;
+	buf_pos = (unsigned int *)firmware->data;
+	buf = (void *)firmware->data;
 	size = firmware->size;
 
 	if (buf_pos[0] != UCODE_MAGIC) {