staging: sm750fb: Rename maxW to max_w in lynx_cursor

The struct lynx_cursor has a member named maxW. This name is
CamelCase and is frowned upon. This commit renames it to max_w
and makes the necessary changes for the module to build.

This change also fixes the following checkpatch CHECK:

CHECK: Avoid CamelCase: <maxW>
115: FILE: drivers/staging/sm750fb/sm750.c:115:
+	if (fbcursor->image.width > cursor->maxW ||

Signed-off-by: Benjamin Philip <benjamin.philip495@gmail.com>
Link: https://lore.kernel.org/r/c0c84569b155df7b510a505a86863987836e192d.1627304144.git.benjamin.philip495@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/sm750fb/sm750.c

@@ -112,7 +112,7 @@ static int lynxfb_ops_cursor(struct fb_info *info, struct fb_cursor *fbcursor)
 	crtc = &par->crtc;
 	cursor = &crtc->cursor;
 
-	if (fbcursor->image.width > cursor->maxW ||
+	if (fbcursor->image.width > cursor->max_w ||
 	    fbcursor->image.height > cursor->max_h ||
 	    fbcursor->image.depth > 1) {
 		return -ENXIO;
@@ -723,8 +723,8 @@ static int lynxfb_set_fbinfo(struct fb_info *info, int index)
 		0x800f0 + (int)crtc->channel * 0x140;
 
 	pr_info("crtc->cursor.mmio = %p\n", crtc->cursor.mmio);
-	crtc->cursor.max_h = crtc->cursor.maxW = 64;
-	crtc->cursor.size = crtc->cursor.max_h * crtc->cursor.maxW * 2 / 8;
+	crtc->cursor.max_h = crtc->cursor.max_w = 64;
+	crtc->cursor.size = crtc->cursor.max_h * crtc->cursor.max_w * 2 / 8;
 	crtc->cursor.vstart = sm750_dev->pvMem + crtc->cursor.offset;
 
 	memset_io(crtc->cursor.vstart, 0, crtc->cursor.size);

drivers/staging/sm750fb/sm750.h

@@ -122,7 +122,7 @@ struct lynx_cursor {
 	int h;
 	int size;
 	/* hardware limitation */
-	int maxW;
+	int max_w;
 	int max_h;
 	/* base virtual address and offset  of cursor image */
 	char __iomem *vstart;

drivers/staging/sm750fb/sm750_cursor.c

@@ -97,7 +97,7 @@ void sm750_hw_cursor_setData(struct lynx_cursor *cursor, u16 rop,
 	count = pitch * cursor->h;
 
 	/* in byte */
-	offset = cursor->maxW * 2 / 8;
+	offset = cursor->max_w * 2 / 8;
 
 	data = 0;
 	pstart = cursor->vstart;
@@ -147,7 +147,7 @@ void sm750_hw_cursor_setData2(struct lynx_cursor *cursor, u16 rop,
 	count = pitch * cursor->h;
 
 	/* in byte */
-	offset = cursor->maxW * 2 / 8;
+	offset = cursor->max_w * 2 / 8;
 
 	data = 0;
 	pstart = cursor->vstart;