media: sun4i-csi: Use CSI_INT_STA_REG name, fix typo in a comment

Fix interrupt status register offset usage to be a defined name
CSI_INT_STA_REG (= 0x34) instead of a plain number.

Additionally fix a typo in a comment of the same file.
Signed-off-by: Oleg Verych <olecom@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/media/platform/sunxi/sun4i-csi/sun4i_dma.c

@@ -245,7 +245,7 @@ static int sun4i_csi_start_streaming(struct vb2_queue *vq, unsigned int count)
 	 * We need a scratch buffer in case where we'll not have any
 	 * more buffer queued so that we don't error out. One of those
 	 * cases is when you end up at the last frame to capture, you
-	 * don't havea any buffer queued any more, and yet it doesn't
+	 * don't have any buffer queued any more, and yet it doesn't
 	 * really matter since you'll never reach the next buffer.
 	 *
 	 * Since we support the multi-planar API, we need to have a
@@ -311,7 +311,7 @@ static int sun4i_csi_start_streaming(struct vb2_queue *vq, unsigned int count)
 	writel(CSI_BUF_CTRL_DBE, csi->regs + CSI_BUF_CTRL_REG);
 
 	/* Clear the pending interrupts */
-	writel(CSI_INT_FRM_DONE, csi->regs + 0x34);
+	writel(CSI_INT_FRM_DONE, csi->regs + CSI_INT_STA_REG);
 
 	/* Enable frame done interrupt */
 	writel(CSI_INT_FRM_DONE, csi->regs + CSI_INT_EN_REG);