drm/savage: drop use of drm_os_linux

Drop use of macros from the deprecated drm_os_linux header.
Simple 1:1 replacements of
- DRM_UDELAY
- DRM_CURRENTPID
- DRM_READ
- DRM_WRITE

With this change we do not need to introduce the deprecated
drm_os_linux.h header when we drop use of drmP.h.

Signed-off-by: Sam Ravnborg <[e-mail]>
Reviewed-by: Daniel Vetter <[e-mail]>
Cc: David Airlie <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

drivers/gpu/drm/savage/savage_bci.c

···
  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
+
+#include <linux/delay.h>
+
 #include <drm/drmP.h>
 #include <drm/savage_drm.h>
 #include "savage_drv.h"
···
 		status = dev_priv->status_ptr[0];
 		if ((status & mask) < threshold)
 			return 0;
-		DRM_UDELAY(1);
+		udelay(1);
 	}
 
 #if SAVAGE_BCI_DEBUG
···
 		status = SAVAGE_READ(SAVAGE_STATUS_WORD0);
 		if ((status & SAVAGE_FIFO_USED_MASK_S3D) <= maxUsed)
 			return 0;
-		DRM_UDELAY(1);
+		udelay(1);
 	}
 
 #if SAVAGE_BCI_DEBUG
···
 		status = SAVAGE_READ(SAVAGE_ALT_STATUS_WORD0);
 		if ((status & SAVAGE_FIFO_USED_MASK_S4) <= maxUsed)
 			return 0;
-		DRM_UDELAY(1);
+		udelay(1);
 	}
 
 #if SAVAGE_BCI_DEBUG
···
 		if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
 		    (status & 0xffff) == 0)
 			return 0;
-		DRM_UDELAY(1);
+		udelay(1);
 	}
 
 #if SAVAGE_BCI_DEBUG
···
 		if ((((status & 0xffff) - e) & 0xffff) <= 0x7fff ||
 		    (status & 0xffff) == 0)
 			return 0;
-		DRM_UDELAY(1);
+		udelay(1);
 	}
 
 #if SAVAGE_BCI_DEBUG
···
 	 */
 	if (d->send_count != 0) {
 		DRM_ERROR("Process %d trying to send %d buffers via drmDMA\n",
-			  DRM_CURRENTPID, d->send_count);
+			  task_pid_nr(current), d->send_count);
 		return -EINVAL;
 	}
 
···
 	 */
 	if (d->request_count < 0 || d->request_count > dma->buf_count) {
 		DRM_ERROR("Process %d trying to get %d buffers (of %d max)\n",
-			  DRM_CURRENTPID, d->request_count, dma->buf_count);
+			  task_pid_nr(current), d->request_count, dma->buf_count);
 		return -EINVAL;
 	}
 

drivers/gpu/drm/savage/savage_drv.h

···
 /*
  * access to MMIO
  */
-#define SAVAGE_READ(reg)	DRM_READ32(  dev_priv->mmio, (reg) )
-#define SAVAGE_WRITE(reg)	DRM_WRITE32( dev_priv->mmio, (reg) )
+#define SAVAGE_READ(reg) \
+       readl(((void __iomem *)dev_priv->mmio->handle) + (reg))
+#define SAVAGE_WRITE(reg) \
+	writel(val, ((void __iomem *)dev_priv->mmio->handle) + (reg))
 
 /*
  * access to the burst command interface (BCI)