powerpc/powernv: Rename machine_check_pSeries_early() to powernv

The routine machine_check_pSeries_early() is only used on powernv, not
pseries. Hence rename machine_check_pSeries_early() to
machine_check_powernv_early().

Reported-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/exceptions-64s.S

@@ -189,7 +189,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206)
 #endif /* CONFIG_PPC_P7_NAP */
 	EXCEPTION_PROLOG_0(PACA_EXMC)
 BEGIN_FTR_SECTION
-	b	machine_check_pSeries_early
+	b	machine_check_powernv_early
 FTR_SECTION_ELSE
 	b	machine_check_pSeries_0
 ALT_FTR_SECTION_END_IFSET(CPU_FTR_HVMODE)
@@ -433,7 +433,7 @@ denorm_exception_hv:
 
 	.align	7
 	/* moved from 0x200 */
-machine_check_pSeries_early:
+machine_check_powernv_early:
 BEGIN_FTR_SECTION
 	EXCEPTION_PROLOG_1(PACA_EXMC, NOTEST, 0x200)
 	/*