add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/tools/testing/selftests/powerpc/primitives/Makefile
..
..
@@ -1,3 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 CFLAGS += -I$(CURDIR)
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 TEST_GEN_PROGS := load_unaligned_zeropad