cleanup: include/: move dma.h to drivers/dma.h

move dma.h to drivers/dma.h and
create a shim for backward-compatibility.

No functional changes to the headers.
A warning in the shim can be controlled with CONFIG_COMPAT_INCLUDES.

Related to #16539

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

drivers/i2s/i2s_cavs.c

@@ -18,7 +18,7 @@
 #include <kernel.h>
 #include <device.h>
 #include <init.h>
-#include <dma.h>
+#include <drivers/dma.h>
 #include <i2s.h>
 #include <soc.h>
 #include "i2s_cavs.h"

drivers/i2s/i2s_ll_stm32.c

@@ -5,7 +5,7 @@
  */
 
 #include <string.h>
-#include <dma.h>
+#include <drivers/dma.h>
 #include <i2s.h>
 #include <soc.h>
 #include <clock_control/stm32_clock_control.h>

drivers/i2s/i2s_sam_ssc.c

@@ -23,7 +23,7 @@
 #include <kernel.h>
 #include <device.h>
 #include <init.h>
-#include <dma.h>
+#include <drivers/dma.h>
 #include <i2s.h>
 #include <soc.h>