brcmsmac: Use kvmalloc() for ucode allocations

The ucode chunk might be relatively large and the allocation with
kmalloc() may fail occasionally.  Since the data isn't DMA-transferred
but by manual loops, we can use vmalloc instead of kmalloc.
For a better performance, though, kvmalloc() would be the best choice
in such a case, so let's replace with it.

Bugzilla: https://bugzilla.suse.com/show_bug.cgi?id=1103431
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/broadcom/brcm80211/brcmsmac/mac80211_if.c

@@ -1578,10 +1578,10 @@ int brcms_ucode_init_buf(struct brcms_info *wl, void **pbuf, u32 idx)
 			if (le32_to_cpu(hdr->idx) == idx) {
 				pdata = wl->fw.fw_bin[i]->data +
 					le32_to_cpu(hdr->offset);
-				*pbuf = kmemdup(pdata, len, GFP_KERNEL);
+				*pbuf = kvmalloc(len, GFP_KERNEL);
 				if (*pbuf == NULL)
 					goto fail;
-
+				memcpy(*pbuf, pdata, len);
 				return 0;
 			}
 		}
@@ -1629,7 +1629,7 @@ int brcms_ucode_init_uint(struct brcms_info *wl, size_t *n_bytes, u32 idx)
  */
 void brcms_ucode_free_buf(void *p)
 {
-	kfree(p);
+	kvfree(p);
 }
 
 /*