brcm: Fix filename for BCM43430 NVRAM for the Raspberry Pi 3 Model B

BCM43430 NVRAM config file for the RPi3 Model B was set to the value
found by brcmf_dmi_probe(), but should use the DT compatible.
Rename the file to actually make it work with the kernel driver.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>

WHENCE

@@ -2443,7 +2443,7 @@ File: "brcm/brcmfmac43430a0-sdio.ONDA-V80 PLUS.txt"
 File: "brcm/brcmfmac43430-sdio.AP6212.txt"
 File: "brcm/brcmfmac43430-sdio.Hampoo-D2D3_Vi8A1.txt"
 File: "brcm/brcmfmac43430-sdio.MUR1DX.txt"
-File: "brcm/brcmfmac43430-sdio.raspberrypi-rpi.txt"
+File: "brcm/brcmfmac43430-sdio.raspberrypi,3-model-b.txt"
 File: "brcm/brcmfmac4356-pcie.gpd-win-pocket.txt"
 
 Licence: GPLv2. See GPL-2 for details.