drivers: convert makefiles to Kbuild style

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 06280d1..a7ae38d 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -5,53 +5,30 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-include $(TOPDIR)/config.mk
-
-LIB	:= $(obj)libmmc.o
-
-
-COBJS-$(CONFIG_BFIN_SDH) += bfin_sdh.o
-COBJS-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o
-COBJS-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o
-COBJS-$(CONFIG_FTSDC010) += ftsdc010_mci.o
-COBJS-$(CONFIG_GENERIC_MMC) += mmc.o
-COBJS-$(CONFIG_GENERIC_ATMEL_MCI) += gen_atmel_mci.o
-COBJS-$(CONFIG_MMC_SPI) += mmc_spi.o
-COBJS-$(CONFIG_ARM_PL180_MMCI) += arm_pl180_mmci.o
-COBJS-$(CONFIG_MV_SDHCI) += mv_sdhci.o
-COBJS-$(CONFIG_MXC_MMC) += mxcmmc.o
-COBJS-$(CONFIG_MXS_MMC) += mxsmmc.o
-COBJS-$(CONFIG_OMAP_HSMMC) += omap_hsmmc.o
-COBJS-$(CONFIG_PXA_MMC_GENERIC) += pxa_mmc_gen.o
-COBJS-$(CONFIG_SDHCI) += sdhci.o
-COBJS-$(CONFIG_BCM2835_SDHCI) += bcm2835_sdhci.o
-COBJS-$(CONFIG_S5P_SDHCI) += s5p_sdhci.o
-COBJS-$(CONFIG_SH_MMCIF) += sh_mmcif.o
-COBJS-$(CONFIG_SPEAR_SDHCI) += spear_sdhci.o
-COBJS-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
-COBJS-$(CONFIG_DWMMC) += dw_mmc.o
-COBJS-$(CONFIG_EXYNOS_DWMMC) += exynos_dw_mmc.o
-COBJS-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o
+obj-$(CONFIG_BFIN_SDH) += bfin_sdh.o
+obj-$(CONFIG_DAVINCI_MMC) += davinci_mmc.o
+obj-$(CONFIG_FSL_ESDHC) += fsl_esdhc.o
+obj-$(CONFIG_FTSDC010) += ftsdc010_mci.o
+obj-$(CONFIG_GENERIC_MMC) += mmc.o
+obj-$(CONFIG_GENERIC_ATMEL_MCI) += gen_atmel_mci.o
+obj-$(CONFIG_MMC_SPI) += mmc_spi.o
+obj-$(CONFIG_ARM_PL180_MMCI) += arm_pl180_mmci.o
+obj-$(CONFIG_MV_SDHCI) += mv_sdhci.o
+obj-$(CONFIG_MXC_MMC) += mxcmmc.o
+obj-$(CONFIG_MXS_MMC) += mxsmmc.o
+obj-$(CONFIG_OMAP_HSMMC) += omap_hsmmc.o
+obj-$(CONFIG_PXA_MMC_GENERIC) += pxa_mmc_gen.o
+obj-$(CONFIG_SDHCI) += sdhci.o
+obj-$(CONFIG_BCM2835_SDHCI) += bcm2835_sdhci.o
+obj-$(CONFIG_S5P_SDHCI) += s5p_sdhci.o
+obj-$(CONFIG_SH_MMCIF) += sh_mmcif.o
+obj-$(CONFIG_SPEAR_SDHCI) += spear_sdhci.o
+obj-$(CONFIG_TEGRA_MMC) += tegra_mmc.o
+obj-$(CONFIG_DWMMC) += dw_mmc.o
+obj-$(CONFIG_EXYNOS_DWMMC) += exynos_dw_mmc.o
+obj-$(CONFIG_ZYNQ_SDHCI) += zynq_sdhci.o
 ifdef CONFIG_SPL_BUILD
-COBJS-$(CONFIG_SPL_MMC_BOOT) += fsl_esdhc_spl.o
+obj-$(CONFIG_SPL_MMC_BOOT) += fsl_esdhc_spl.o
 else
-COBJS-$(CONFIG_GENERIC_MMC) += mmc_write.o
+obj-$(CONFIG_GENERIC_MMC) += mmc_write.o
 endif
-
-COBJS	:= $(COBJS-y)
-SRCS	:= $(COBJS:.o=.c)
-OBJS	:= $(addprefix $(obj),$(COBJS))
-
-all:	$(LIB)
-
-$(LIB): $(obj).depend $(OBJS)
-	$(call cmd_link_o_target, $(OBJS))
-
-#########################################################################
-
-# defines $(obj).depend target
-include $(SRCTREE)/rules.mk
-
-sinclude $(obj).depend
-
-#########################################################################