top: Rename "blob" to "firmware" everywhere

This patch renames "blob" to "firmware" everywhere for better
and intutive naming.

Signed-off-by: Anup Patel <anup@brainfault.org>

firmware/fw_payload.S

@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2018 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ *   Anup Patel <anup.patel@wdc.com>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include "fw_common.S"
+
+	.align 3
+	.section .entry, "ax", %progbits
+	.global fw_prev_arg1
+fw_prev_arg1:
+	/* We return previous arg1 in 'a0' */
+#ifdef FW_PAYLOAD_FDT_PATH
+	la	a0, fdt_bin
+#else
+	add	a0, zero, zero
+#endif
+	ret
+
+	.align 3
+	.section .entry, "ax", %progbits
+	.global fw_next_arg1
+fw_next_arg1:
+	/* We return next arg1 in 'a0' */
+#ifdef FW_PAYLOAD_FDT_ADDR
+	li	a0, FW_PAYLOAD_FDT_ADDR
+#else
+	add	a0, zero, zero
+#endif
+	ret
+
+	.align 3
+	.section .entry, "ax", %progbits
+	.global fw_next_addr
+fw_next_addr:
+	/* We return next address in 'a0' */
+	la	a0, payload_bin
+	ret
+
+#define	str(s)		#s
+#define	stringify(s)	str(s)
+
+#ifdef FW_PAYLOAD_FDT_PATH
+	.align 3
+	.section .text, "ax", %progbits
+	.globl fdt_bin
+fdt_bin:
+	.incbin	stringify(FW_PAYLOAD_FDT_PATH)
+#endif
+
+	.section .payload, "ax", %progbits
+	.globl payload_bin
+payload_bin:
+#ifndef FW_PAYLOAD_PATH
+	wfi
+	j	payload_bin
+#else
+	.incbin	stringify(FW_PAYLOAD_PATH)
+#endif