boot/mv-ddr-marvell: fix license file hash

Commit 2cfdf8b8a269 (boot/mv-ddr-marvell: Bump to HEAD as of 20201207)
forgot to update the hash a a source file that we use as license file.

Fixes: #14221

Reported-by: nyanyamiau@gmail.com
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: D. Olsson <hi@senzilla.io>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
(cherry picked from commit f05136090de781d038070b1b197fb868c7c339cd)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

boot/mv-ddr-marvell/mv-ddr-marvell.hash

@@ -1,3 +1,3 @@
 # Locally calculated
 sha256  bfab74a625d65238c569b9df282b55c0fc9a1e2d3decedcf194d44774df2ede4  mv-ddr-marvell-305d923e6bc4236cd3b902f6679b0aef9e5fa52d.tar.gz
-sha256  69208236fc322026920b92d1d839ebdc521ca65379bfdb3368a24945e794fc78  ddr3_init.c
+sha256  48bb930b6fbc3f5db72e29c849b096df3868e4a6d2bdc0e2dd3365c768241cd5  ddr3_init.c