package/amd-catalyst: fix legal-info

Fixes
http://autobuild.buildroot.net/results/4f1/4f1e9b4bf43add4712e82d4a58e633abb2a7d2b8/

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/amd-catalyst/amd-catalyst.mk

@@ -10,7 +10,7 @@ AMD_CATALYST_SITE = http://www2.ati.com/drivers/linux
 AMD_CATALYST_DL_OPTS = --referer='http://support.amd.com'
 AMD_CATALYST_SOURCE = amd-catalyst-$(AMD_CATALYST_VERSION)-linux-installer-$(AMD_CATALYST_VERBOSE_VER)-x86.x86_64.zip
 AMD_CATALYST_LICENSE = AMD Software License
-AMD_CATALYST_LICENSE_FILES = LICENSE.txt
+AMD_CATALYST_LICENSE_FILES = LICENSE.TXT
 AMD_CATALYST_INSTALL_STAGING = YES
 AMD_CATALYST_SUFFIX = $(if $(BR2_x86_64),_64)
 AMD_CATALYST_ARCH_DIR = $(@D)/arch/x86$(AMD_CATALYST_SUFFIX)