[MMC] Pass -DDEBUG on compiler command line if MMC_DEBUG selected
Rather than each driver test MMC_DEBUG itself, and define DEBUG,
pass it in via the makefile instead.
Fix drivers to use pr_debug() where appropriate, and avoid defining
a DEBUG() macro.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/mmc/Makefile b/drivers/mmc/Makefile
index 0b0920a..c7c34aa 100644
--- a/drivers/mmc/Makefile
+++ b/drivers/mmc/Makefile
@@ -23,3 +23,7 @@
obj-$(CONFIG_MMC_OMAP) += omap.o
mmc_core-y := mmc.o mmc_queue.o mmc_sysfs.o
+
+ifeq ($(CONFIG_MMC_DEBUG),y)
+EXTRA_CFLAGS += -DDEBUG
+endif