Commit 2749a2f26a7c (powerpc/book3s: Fix machine check handling for
unhandled errors) introduced a few ABIv2 issues.

We can maintain ABIv1 and ABIv2 compatibility by branching to the
function rather than the dot symbol.

Fixes: 2749a2f26a7c ("powerpc/book3s: Fix machine check handling for unhandled 
errors")
Signed-off-by: Anton Blanchard <an...@samba.org>
---

Index: b/arch/powerpc/kernel/exceptions-64s.S
===================================================================
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1502,13 +1502,13 @@ machine_check_handle_early:
 unrecover_mce:
        /* Invoke machine_check_exception to print MCE event and panic. */
        addi    r3,r1,STACK_FRAME_OVERHEAD
-       bl      .machine_check_exception
+       bl      machine_check_exception
        /*
         * We will not reach here. Even if we did, there is no way out. Call
         * unrecoverable_exception and die.
         */
 1:     addi    r3,r1,STACK_FRAME_OVERHEAD
-       bl      .unrecoverable_exception
+       bl      unrecoverable_exception
        b       1b
 /*
  * r13 points to the PACA, r9 contains the saved CR,
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