add boot partition size

hc

2023-12-11 d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d

 kernel/drivers/block/xen-blkback/Makefile
..
..
@@ -1,3 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 obj-$(CONFIG_XEN_BLKDEV_BACKEND) := xen-blkback.o
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 xen-blkback-y	:= blkback.o xenbus.o