boot/arm-trusted-firmware: fix hash checking

Commit
c6ab9328e13c6c9a1538b4a33824525a990b623d ("boot/arm-trusted-firmware:
change BR_NO_CHECK_HASH_FOR logic") was written too hastily, and is
actually broken as it does the reverse of what it should do. It really
should disable the check when we're using a custom version/git/tarball
of TF-A, not the opposite.

Thanks to Romain for pointing out the problem, and providing an IRL
patch to solve the issue.

Reported-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

boot/arm-trusted-firmware/arm-trusted-firmware.mk

@@ -25,7 +25,7 @@ ARM_TRUSTED_FIRMWARE_LICENSE_FILES = docs/license.rst
 endif
 endif
 
-ifeq ($(BR2_TARGET_ARM_TRUSTED_FIRMWARE)$(BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_VERSION)$(BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_TARBALL)$(BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_GIT),y)
+ifeq ($(BR2_TARGET_ARM_TRUSTED_FIRMWARE):$(BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_VERSION)$(BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_TARBALL)$(BR2_TARGET_ARM_TRUSTED_FIRMWARE_CUSTOM_GIT),y:y)
 BR_NO_CHECK_HASH_FOR += $(ARM_TRUSTED_FIRMWARE_SOURCE)
 endif