asm: make all text section labels .L local

To help with backtraces if we ever fix them due to the lkmc_asm_main_after_prologue debacle.

baremetal/arch/aarch64/multicore.S

@@ -15,7 +15,7 @@ LKMC_PROLOGUE
     mrs x1, mpidr_el1
     ands x1, x1, 3
     beq cpu0_only
-cpu1_only:
+.Lcpu1_only:
     /* Only CPU 1 reaches this point and sets the spinlock. */
     mov x0, 1
     ldr x1, =spinlock
@@ -28,12 +28,12 @@ cpu1_only:
      * Optional, but could save power on a real system.
      */
     sev
-cpu1_sleep_forever:
+.Lcpu1_sleep_forever:
     /* Hint CPU 1 to enter low power mode.
      * Optional, but could save power on a real system.
      */
     wfe
-    b cpu1_sleep_forever
+    b .Lcpu1_sleep_forever
 cpu0_only:
     /* Only CPU 0 reaches this point. */
 
@@ -46,7 +46,7 @@ cpu0_only:
     /* Argument 1: target_cpu */
     mov x1, 1
     /* Argument 2: entry_point_address */
-    ldr x2, =cpu1_only
+    ldr x2, =.Lcpu1_only
     /* Argument 3: context_id */
     mov x3, 0
     /* Unused hvc args: the Linux kernel zeroes them,

baremetal/arch/arm/multicore.S

@@ -10,21 +10,21 @@ LKMC_PROLOGUE
     mrc p15, 0, r1, c0, c0, 5
     ands r1, r1, 3
     beq cpu0_only
-cpu1_only:
+.Lcpu1_only:
     mov r0, 1
     ldr r1, =spinlock
     str r0, [r1]
     dmb sy
     sev
-cpu1_sleep_forever:
+.Lcpu1_sleep_forever:
     wfe
-    b cpu1_sleep_forever
+    b .Lcpu1_sleep_forever
 cpu0_only:
 #if !LKMC_GEM5
     /* PSCI CPU_ON. */
     ldr r0, =0x84000003
     mov r1, 1
-    ldr r2, =cpu1_only
+    ldr r2, =.Lcpu1_only
     mov r3, 0
     hvc 0
 #endif