package/brcm-patchram-plus: fix license file hash

Commit 684bcc45
("package/brcm-patchram-plus: fix build on sparc") added a patch that
modifies the src/main.c file, without paying attention to the fact
that this file is used as the license file for the package, and
therefore the .hash had to be updated at the same time. This commit
updates the license file hash as needed. There are obviously no
licensing related changes in the SPARC build fixes.

Fixes:

  http://autobuild.buildroot.net/results/083ce1c3100b10e40480e6330ce0c29dde51f5e0/



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