powerpc: No need to initialise statics to 0

Static variables do not need to be initialised to 0, because compiler
will initialise all uninitialised statics to 0. Thus, remove the
unneeded initializations.
Signed-off-by: Xiang wangx <wangxiang@cdjrlc.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/20211221033423.29820-1-wangxiang@cdjrlc.com

arch/powerpc/platforms/powermac/nvram.c

@@ -71,7 +71,7 @@ struct core99_header {
 static int nvram_naddrs;
 static volatile unsigned char __iomem *nvram_data;
 static int is_core_99;
-static int core99_bank = 0;
+static int core99_bank;
 static int nvram_partitions[3];
 // XXX Turn that into a sem
 static DEFINE_RAW_SPINLOCK(nv_lock);