linux-firmware: Bring up wifi/ble interface on rpi3

Currently the firmware is installed but kernel fails to load it
due this .txt file missing in the firmware directory and it ends
up with wifi/bluetooth i/f not being initialized. The error is
also in dmesg

[    3.120991] usbcore: registered new interface driver brcmfmac
[    3.148240] brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac43430-sdio.txt failed with error -2

After applying this patch now ifconfig -a can list wlan0 interface
successfully.

Signed-off-by: Khem Raj <raj.khem@gmail.com>

recipes-kernel/linux-firmware/files/brcmfmac43430-sdio.txt

@@ -0,0 +1,66 @@
+# NVRAM file for BCM943430WLPTH
+# 2.4 GHz, 20 MHz BW mode
+
+# The following parameter values are just placeholders, need to be updated.
+manfid=0x2d0
+prodid=0x0727
+vendid=0x14e4
+devid=0x43e2
+boardtype=0x0727
+boardrev=0x1101
+boardnum=22
+macaddr=00:90:4c:c5:12:38
+sromrev=11
+boardflags=0x00404201
+boardflags3=0x08000000
+xtalfreq=37400
+nocrc=1
+ag0=255
+aa2g=1
+ccode=ALL
+
+pa0itssit=0x20
+extpagain2g=0
+#PA parameters for 2.4GHz, measured at CHIP OUTPUT
+pa2ga0=-168,7161,-820
+AvVmid_c0=0x0,0xc8
+cckpwroffset0=5
+
+# PPR params
+maxp2ga0=84
+txpwrbckof=6
+cckbw202gpo=0
+legofdmbw202gpo=0x66111111
+mcsbw202gpo=0x77711111
+propbw202gpo=0xdd
+
+# OFDM IIR :
+ofdmdigfilttype=18
+ofdmdigfilttypebe=18
+# PAPD mode:
+papdmode=1
+papdvalidtest=1
+pacalidx2g=42
+papdepsoffset=-22
+papdendidx=58
+
+# LTECX flags
+ltecxmux=0
+ltecxpadnum=0x0102
+ltecxfnsel=0x44
+ltecxgcigpio=0x01
+
+il0macaddr=00:90:4c:c5:12:38
+wl0id=0x431b
+
+deadman_to=0xffffffff
+# muxenab: 0x1 for UART enable, 0x2 for GPIOs, 0x8 for JTAG
+muxenab=0x1
+# CLDO PWM voltage settings - 0x4 - 1.1 volt
+#cldo_pwm=0x4
+
+#VCO freq 326.4MHz
+spurconfig=0x3 
+
+edonthd20l=-75
+edoffthd20ul=-80

recipes-kernel/linux-firmware/linux-firmware_%.bbappend

@@ -0,0 +1,12 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/files:"
+
+SRC_URI += "file://brcmfmac43430-sdio.txt"
+
+do_install_append() {
+	install -D -m 0644 ${WORKDIR}/brcmfmac43430-sdio.txt ${D}/lib/firmware/brcm/brcmfmac43430-sdio.txt
+}
+
+FILES_${PN}-bcm43430 += " \
+  /lib/firmware/brcm/brcmfmac43430-sdio.txt \
+"
+