Place assembler functions in separate sections

This extends the --gc-sections behaviour to the many assembler
support functions in the firmware images by placing each function
into its own code section. This is achieved by creating a 'func'
macro used to declare each function label.

Fixes ARM-software/tf-issues#80

Change-Id: I301937b630add292d2dec6d2561a7fcfa6fec690

services/spd/tspd/tspd_helpers.S

@@ -44,7 +44,7 @@
 	 * saved.
 	 * ---------------------------------------------
 	 */
-tspd_enter_sp:
+func tspd_enter_sp
 	/* Make space for the registers that we're going to save */
 	mov	x3, sp
 	str	x3, [x0, #0]
@@ -79,7 +79,7 @@ tspd_enter_sp:
 	 * ---------------------------------------------
 	 */
 	.global tspd_exit_sp
-tspd_exit_sp:
+func tspd_exit_sp
 	/* Restore the previous stack */
 	mov	sp, x0
 

services/std_svc/psci/psci_entry.S

@@ -41,8 +41,6 @@
 	.globl	__psci_cpu_off
 	.globl	__psci_cpu_suspend
 
-	.section	.text, "ax"; .align 3
-
 	/* -----------------------------------------------------
 	 * This cpu has been physically powered up. Depending
 	 * upon whether it was resumed from suspend or simply
@@ -55,7 +53,7 @@
 	 * all this is done.
 	 * -----------------------------------------------------
 	 */
-psci_aff_on_finish_entry:
+func psci_aff_on_finish_entry
 	adr	x23, psci_afflvl_on_finishers
 	b	psci_aff_common_finish_entry
 
@@ -120,7 +118,7 @@ _panic:
 	 * suffering from stack coherency issues
 	 * -----------------------------------------------------
 	 */
-__psci_cpu_off:
+func __psci_cpu_off
 	func_prologue
 	sub	sp, sp, #0x10
 	stp	x19, x20, [sp, #0]
@@ -137,7 +135,7 @@ __psci_cpu_off:
 	func_epilogue
 	ret
 
-__psci_cpu_suspend:
+func __psci_cpu_suspend
 	func_prologue
 	sub	sp, sp, #0x20
 	stp	x19, x20, [sp, #0]
@@ -162,7 +160,7 @@ __psci_cpu_suspend:
 	func_epilogue
 	ret
 
-final_wfi:
+func final_wfi
 	dsb	sy
 	wfi
 wfi_spill: