brcm: rename Rock960 NVRAM to AP6356S and link devices to it

The Rock960, VIM2 and Firefly3399 all have a AP6356S WiFi module
and their NVRAM all appear to be the same so call the NVRAM after
the AP module and link the 3 devices to that to make it clear.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -3012,8 +3012,10 @@ Link: brcm/brcmfmac43455-sdio.Raspberry\ Pi\ Foundation-Raspberry\ Pi\ 4\ Model\
 Link: brcm/brcmfmac43455-sdio.Raspberry\ Pi\ Foundation-Raspberry\ Pi\ Compute\ Module\ 4.txt -> brcmfmac43455-sdio.raspberrypi,4-model-b.txt
 File: "brcm/brcmfmac43455-sdio.MINIX-NEO Z83-4.txt"
 File: "brcm/brcmfmac4356-pcie.gpd-win-pocket.txt"
-File: brcm/brcmfmac4356-sdio.vamrs,rock960.txt
-Link: brcm/brcmfmac4356-sdio.khadas,vim2.txt -> brcmfmac4356-sdio.vamrs,rock960.txt
+File: brcm/brcmfmac4356-sdio.AP6356S.txt
+Link: brcm/brcmfmac4356-sdio.firefly,firefly-rk3399.txt -> brcmfmac4356-sdio.AP6356S.txt
+Link: brcm/brcmfmac4356-sdio.khadas,vim2.txt -> brcmfmac4356-sdio.AP6356S.txt
+Link: brcm/brcmfmac4356-sdio.vamrs,rock960.txt -> brcmfmac4356-sdio.AP6356S.txt
 
 Licence: GPLv2. See GPL-2 for details.