common: Make sure arch-specific map_sysmem() is defined

In the case where the arch defines a custom map_sysmem(), make sure that
including just mapmem.h is sufficient to have these functions as they
are when the arch does not override it.

Also split the non-arch specific functions out of common.h

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/demo/demo-simple.c b/drivers/demo/demo-simple.c
index 2bcb7df..f069748 100644
--- a/drivers/demo/demo-simple.c
+++ b/drivers/demo/demo-simple.c
@@ -10,6 +10,7 @@
 #include <common.h>
 #include <dm.h>
 #include <dm-demo.h>
+#include <mapmem.h>
 #include <asm/io.h>
 
 static int simple_hello(struct udevice *dev, int ch)
diff --git a/drivers/i2c/i2c-uniphier-f.c b/drivers/i2c/i2c-uniphier-f.c
index fd28c17..d29dd45 100644
--- a/drivers/i2c/i2c-uniphier-f.c
+++ b/drivers/i2c/i2c-uniphier-f.c
@@ -14,6 +14,7 @@
 #include <dm/root.h>
 #include <i2c.h>
 #include <fdtdec.h>
+#include <mapmem.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
diff --git a/drivers/i2c/i2c-uniphier.c b/drivers/i2c/i2c-uniphier.c
index 666272d..c4972ff 100644
--- a/drivers/i2c/i2c-uniphier.c
+++ b/drivers/i2c/i2c-uniphier.c
@@ -14,6 +14,7 @@
 #include <dm/root.h>
 #include <i2c.h>
 #include <fdtdec.h>
+#include <mapmem.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c
index c2dac66..d19138d 100644
--- a/drivers/mtd/spi/sf_probe.c
+++ b/drivers/mtd/spi/sf_probe.c
@@ -13,6 +13,7 @@
 #include <errno.h>
 #include <fdtdec.h>
 #include <malloc.h>
+#include <mapmem.h>
 #include <spi.h>
 #include <spi_flash.h>
 #include <asm/io.h>
diff --git a/drivers/serial/ns16550.c b/drivers/serial/ns16550.c
index 03beab5..67b1d60 100644
--- a/drivers/serial/ns16550.c
+++ b/drivers/serial/ns16550.c
@@ -8,6 +8,7 @@
 #include <dm.h>
 #include <errno.h>
 #include <fdtdec.h>
+#include <mapmem.h>
 #include <ns16550.h>
 #include <serial.h>
 #include <watchdog.h>
diff --git a/drivers/serial/serial_uniphier.c b/drivers/serial/serial_uniphier.c
index 98e3b81..74547eb 100644
--- a/drivers/serial/serial_uniphier.c
+++ b/drivers/serial/serial_uniphier.c
@@ -11,6 +11,7 @@
 #include <asm/errno.h>
 #include <dm/device.h>
 #include <dm/platform_data/serial-uniphier.h>
+#include <mapmem.h>
 #include <serial.h>
 #include <fdtdec.h>