onenand: g_malloc() can't fail, bury dead error handling

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/block/onenand.c

diff --git a/hw/block/onenand.c b/hw/block/onenand.c
index 348630d..1b2c893 100644
--- a/hw/block/onenand.c
+++ b/hw/block/onenand.c
@@ -346,15 +346,9 @@
 static inline int onenand_erase(OneNANDState *s, int sec, int num)
 {
     uint8_t *blankbuf, *tmpbuf;
+
     blankbuf = g_malloc(512);
-    if (!blankbuf) {
-        return 1;
-    }
     tmpbuf = g_malloc(512);
-    if (!tmpbuf) {
-        g_free(blankbuf);
-        return 1;
-    }
     memset(blankbuf, 0xff, 512);
     for (; num > 0; num--, sec++) {
         if (s->blk_cur) {