[openwrt/openwrt] arm-trusted-firmware-mediatek: update to git HEAD

[LEDE Commits]

dangole pushed a commit to openwrt/openwrt.git, branch master:
https://git.openwrt.org/c91c0c1f851a8511466735f7ca1ba888d3b088a4

commit c91c0c1f851a8511466735f7ca1ba888d3b088a4
Author: Daniel Golle <daniel at makrotopia.org>
AuthorDate: Sat May 8 22:34:16 2021 +0100

    arm-trusted-firmware-mediatek: update to git HEAD
    
    Most notably this enabled use of pstore/ramoops on MT7622 as DRAM
    content is now preserved over reboot.
    
    Signed-off-by: Daniel Golle <daniel at makrotopia.org>
---
 package/boot/arm-trusted-firmware-mediatek/Makefile | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/package/boot/arm-trusted-firmware-mediatek/Makefile b/package/boot/arm-trusted-firmware-mediatek/Makefile
index a1787ead21..4cf9bec7e9 100644
--- a/package/boot/arm-trusted-firmware-mediatek/Makefile
+++ b/package/boot/arm-trusted-firmware-mediatek/Makefile
@@ -13,9 +13,9 @@ PKG_RELEASE:=$(AUTORELEASE)
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL=https://github.com/mtk-openwrt/arm-trusted-firmware.git
-PKG_SOURCE_DATE:=2021-04-28
-PKG_SOURCE_VERSION:=a63914612904642ed974390fff620f7003ebc20a
-PKG_MIRROR_HASH:=6396a36406ceecf667470d0d673552751573de65497bf97d1e2af3505fe79366
+PKG_SOURCE_DATE:=2021-05-08
+PKG_SOURCE_VERSION:=d2c75b2139be003887af9cc5a94da5e9bdc59de7
+PKG_MIRROR_HASH:=4af9ce8e11511afee7f588cc982946c06339edbfa47afef6a7f3e2231ac9f34d
 
 PKG_MAINTAINER:=Daniel Golle <daniel at makrotopia.org>