[source] firmware: add support for PCMCIA Aircard's

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/04f29eef370d6de49b5533567ba5e5cdd7cb8906

commit 04f29eef370d6de49b5533567ba5e5cdd7cb8906
Author: Tomasz Maciej Nowak <tomek_n at o2.pl>
AuthorDate: Sat Dec 17 21:50:24 2016 +0100

    firmware: add support for PCMCIA Aircard's
    
    Add .cis firmware for Sierra Wireless Aircard GPRS/3G PCMCIA modems:
    
     - Aircard 555
     - Aircards 7xx
     - Aircards 8x0
    
    There is a package named sierra-pcmcia in obsoleted repository for
    packages at git.openwrt.org but there's no reason to reintroduce it in
    current packages repo because these files are part of upstream
    linux-firmware.
    
    Signed-off-by: Tomasz Maciej Nowak <tomek_n at o2.pl>
---
 package/firmware/linux-firmware/cis.mk | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/package/firmware/linux-firmware/cis.mk b/package/firmware/linux-firmware/cis.mk
new file mode 100644
index 0000000..4a59957
--- /dev/null
+++ b/package/firmware/linux-firmware/cis.mk
@@ -0,0 +1,10 @@
+Package/aircard-pcmcia-firmware = $(call Package/firmware-default,Sierra Wireless Aircard 555/7xx/8x0 firmware)
+define Package/aircard-pcmcia-firmware/install
+	$(INSTALL_DIR) $(1)/lib/firmware/cis
+	$(INSTALL_DATA) \
+		$(PKG_BUILD_DIR)/cis/SW_555_SER.cis \
+		$(PKG_BUILD_DIR)/cis/SW_7xx_SER.cis \
+		$(PKG_BUILD_DIR)/cis/SW_8xx_SER.cis \
+		$(1)/lib/firmware/cis
+endef
+$(eval $(call BuildPackage,aircard-pcmcia-firmware))