firmware: Rename fw_common.S to fw_base.S

The fw_common.S is the base firmware extendend by fw_jump and
fw_payload. This patch renames fw_common.S to fw_base.S to
have more clear/intutive name for base firmware.

Signed-off-by: Anup Patel <anup.patel@wdc.com>

firmware/fw_jump.S

@@ -7,7 +7,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include "fw_common.S"
+#include "fw_base.S"
 
 	.align 3
 	.section .entry, "ax", %progbits

firmware/fw_jump.elf.ldS

@@ -12,5 +12,5 @@ ENTRY(_start)
 
 SECTIONS
 {
-	#include "fw_common.ldS"
+	#include "fw_base.ldS"
 }

firmware/fw_payload.S

@@ -7,7 +7,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include "fw_common.S"
+#include "fw_base.S"
 
 	.align 3
 	.section .entry, "ax", %progbits

firmware/fw_payload.elf.ldS

@@ -12,7 +12,7 @@ ENTRY(_start)
 
 SECTIONS
 {
-	#include "fw_common.ldS"
+	#include "fw_base.ldS"
 
 	. = FW_TEXT_START + FW_PAYLOAD_OFFSET;