powerpc/boot: Use CONFIG_PPC_POWERNV to compile OPAL support

CONFIG_PPC64_BOOT_WRAPPER is selected by CPU_LITTLE_ENDIAN which is
used to compile support for other platforms such as Microwatt. There
is no need for OPAL calls on these.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211011070356.99952-1-clg@kaod.org

arch/powerpc/boot/Makefile

@@ -123,7 +123,7 @@ src-wlib-y := string.S crt0.S stdio.c decompress.c main.c \
 		oflib.c ofconsole.c cuboot.c
 
 src-wlib-$(CONFIG_PPC_MPC52xx) += mpc52xx-psc.c
-src-wlib-$(CONFIG_PPC64_BOOT_WRAPPER) += opal-calls.S opal.c
+src-wlib-$(CONFIG_PPC_POWERNV) += opal-calls.S opal.c
 ifndef CONFIG_PPC64_BOOT_WRAPPER
 src-wlib-y += crtsavres.S
 endif

arch/powerpc/boot/serial.c

@@ -132,7 +132,7 @@ int serial_console_init(void)
 	else if (dt_is_compatible(devp, "fsl,mpc5200-psc-uart"))
 		rc = mpc5200_psc_console_init(devp, &serial_cd);
 #endif
-#ifdef CONFIG_PPC64_BOOT_WRAPPER
+#ifdef CONFIG_PPC_POWERNV
 	else if (dt_is_compatible(devp, "ibm,opal-console-raw"))
 		rc = opal_console_init(devp, &serial_cd);
 #endif