sign-fs: fix build if PASS_FILE is not set
commit:825d05f0 ("Signing fs: add PASS_FILE as set in README") add handling of variable PASS_FILE. If this variable is not set build failed, fix it.
Signed-off-by: Heiko Schocher hs@denx.de
commit:825d05f0 ("Signing fs: add PASS_FILE as set in README") add handling of variable PASS_FILE. If this variable is not set build failed, fix it.
Signed-off-by: Heiko Schocher hs@denx.de