lib: convert makefiles to Kbuild style
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/lib/rsa/Makefile b/lib/rsa/Makefile
index decd6e5..693c745 100644
--- a/lib/rsa/Makefile
+++ b/lib/rsa/Makefile
@@ -7,26 +7,6 @@
# SPDX-License-Identifier: GPL-2.0+
#
-include $(TOPDIR)/config.mk
-
-LIB = $(obj)librsa.o
-
ifdef CONFIG_FIT_SIGNATURE
-COBJS-$(CONFIG_RSA) += rsa-verify.o
+obj-$(CONFIG_RSA) += rsa-verify.o
endif
-
-COBJS := $(sort $(COBJS-y))
-SRCS := $(COBJS:.o=.c)
-OBJS := $(addprefix $(obj),$(COBJS))
-
-$(LIB): $(obj).depend $(OBJS)
- $(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################