package/linux-firmware: add missing closing double quotes

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/linux-firmware/Config.in

@@ -305,7 +305,7 @@ config BR2_PACKAGE_LINUX_FIRMWARE_MWIFIEX_PCIE8897
 	  Firmware files for the Marvell Wifi-Ex 8897 module on PCI-E.
 
 config BR2_PACKAGE_LINUX_FIRMWARE_MWIFIEX_PCIEUART8997
-	bool "Marvell Wifi-Ex 8997 PCI-E/UART
+	bool "Marvell Wifi-Ex 8997 PCI-E/UART"
 	help
 	  Firmware files for the Marvell Wifi-Ex 8997 module on
 	  PCI-E/UART.