linux-firmware: add rtl8761 bluetooth firmware

Realtek bluetooth devices need firmware.  Add packages for some of
these.

Tested on a WNDR3700v4 with rtl8761bu firmware.

Signed-off-by: Quintin Hill <[email protected]>

package/firmware/linux-firmware/realtek.mk

@@ -86,6 +86,29 @@ define Package/rtl8723bu-firmware/install
 endef
 $(eval $(call BuildPackage,rtl8723bu-firmware))
 
+Package/rtl8761a-firmware = $(call Package/firmware-default,RealTek RTL8761A firmware)
+define Package/rtl8761a-firmware/install
+	$(INSTALL_DIR) $(1)/lib/firmware/rtl_bt
+	$(INSTALL_DATA) $(PKG_BUILD_DIR)/rtl_bt/rtl8761a_fw.bin $(1)/lib/firmware/rtl_bt
+endef
+$(eval $(call BuildPackage,rtl8761a-firmware))
+
+Package/rtl8761b-firmware = $(call Package/firmware-default,RealTek RTL8761B firmware)
+define Package/rtl8761b-firmware/install
+	$(INSTALL_DIR) $(1)/lib/firmware/rtl_bt
+	$(INSTALL_DATA) $(PKG_BUILD_DIR)/rtl_bt/rtl8761b_config.bin $(1)/lib/firmware/rtl_bt
+	$(INSTALL_DATA) $(PKG_BUILD_DIR)/rtl_bt/rtl8761b_fw.bin $(1)/lib/firmware/rtl_bt
+endef
+$(eval $(call BuildPackage,rtl8761b-firmware))
+
+Package/rtl8761bu-firmware = $(call Package/firmware-default,RealTek RTL8761BU firmware)
+define Package/rtl8761bu-firmware/install
+	$(INSTALL_DIR) $(1)/lib/firmware/rtl_bt
+	$(INSTALL_DATA) $(PKG_BUILD_DIR)/rtl_bt/rtl8761bu_config.bin $(1)/lib/firmware/rtl_bt
+	$(INSTALL_DATA) $(PKG_BUILD_DIR)/rtl_bt/rtl8761bu_fw.bin $(1)/lib/firmware/rtl_bt
+endef
+$(eval $(call BuildPackage,rtl8761bu-firmware))
+
 Package/rtl8821ae-firmware = $(call Package/firmware-default,RealTek RTL8821AE firmware)
 define Package/rtl8821ae-firmware/install
 	$(INSTALL_DIR) $(1)/lib/firmware/rtlwifi