powerpc: Fix spelling mistake "mesages" -> "messages" in Kconfig

There is a spelling mistake in the Kconfig text. Fix it.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210704093846.36972-1-colin.king@canonical.com

arch/powerpc/platforms/ps3/Kconfig

@@ -90,7 +90,7 @@ config PS3_VERBOSE_RESULT
 	bool "PS3 Verbose LV1 hypercall results" if PS3_ADVANCED
 	depends on PPC_PS3
 	help
-	  Enables more verbose log mesages for LV1 hypercall results.
+	  Enables more verbose log messages for LV1 hypercall results.
 
 	  If in doubt, say N here and reduce the size of the kernel by a
 	  small amount.