libc: Consolidate unified definitions

As supporting architectures aside from AArch32 and AArch64 is not a
concern, keeping identical definitions in two places for a large part
of the libc seems counterproductive

The int128 types were left un-unified as __int128 is not supported by
gcc on AArch32

Signed-off-by: Bence Szépkúti <bence.szepkuti@arm.com>
Change-Id: Idf08e6fab7e4680d9da62d3c57266ea2d80472cf
diff --git a/drivers/arm/sbsa/sbsa.c b/drivers/arm/sbsa/sbsa.c
index 6f00a60..79c6f26 100644
--- a/drivers/arm/sbsa/sbsa.c
+++ b/drivers/arm/sbsa/sbsa.c
@@ -4,11 +4,11 @@
  * SPDX-License-Identifier: BSD-3-Clause
  */
 
-#include <plat/common/platform.h>
+#include <assert.h>
+#include <stdint.h>
 #include <drivers/arm/sbsa.h>
 #include <lib/mmio.h>
-#include <stdint_.h>
-#include <assert.h>
+#include <plat/common/platform.h>
 
 void sbsa_watchdog_offset_reg_write(uintptr_t base, uint64_t value)
 {