linux-firmware: fix md5sum

The copy on the mirror has a different md5sum as specified in this
package Makefile. The content of the file on the mirror is the same as
in the checkout so just update our md5sum.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

package/firmware/linux-firmware/Makefile

@@ -17,7 +17,7 @@ PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_SOURCE_VERSION)
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_SOURCE_SUBDIR)
 PKG_SOURCE_URL:=https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git
-PKG_MIRROR_MD5SUM:=ca4d289ad9380471cae376fc7dd3660a
+PKG_MIRROR_MD5SUM:=8d44332359de89b1936b4ff608a72614
 
 PKG_MAINTAINER:=Felix Fietkau <nbd@nbd.name>