powerpc/axonram: Drop unnecessary variable initialisation

The local variable "rc" will eventually be set only to an error code.
Thus omit the explicit initialisation at the beginning.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/sysdev/axonram.c

@@ -184,7 +184,7 @@ static int axon_ram_probe(struct platform_device *device)
 	static int axon_ram_bank_id = -1;
 	struct axon_ram_bank *bank;
 	struct resource resource;
-	int rc = 0;
+	int rc;
 
 	axon_ram_bank_id++;