package/linux-firmware: bump revision

Some updated firmwares files.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/linux-firmware/linux-firmware.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LINUX_FIRMWARE_VERSION = 4a050f5524a09c35192273e3a5d741f63e7bf7d6
+LINUX_FIRMWARE_VERSION = f66291398181d24856fd2d19454d246199abd5ea
 LINUX_FIRMWARE_SITE = http://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
 LINUX_FIRMWARE_SITE_METHOD = git