staging: sm750fb: rename camel case identifiers

Rename two identifiers from camel case to snake case, in order to follow
kernel coding style.

Changes:

- Local variable `deCtrl` to `de_ctrl`
- Function `deGetTransparency` to `de_get_transparency`

Signed-off-by: Ahmet Sezgin Duran <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/sm750fb/sm750_accel.c

···
 		      u32 x, u32 y, u32 width, u32 height,
 		      u32 color, u32 rop)
 {
-	u32 deCtrl;
+	u32 de_ctrl;
 
 	if (accel->de_wait() != 0) {
 		/*
···
 		  ((width << DE_DIMENSION_X_SHIFT) & DE_DIMENSION_X_MASK) |
 		  (height & DE_DIMENSION_Y_ET_MASK)); /* dpr8 */
 
-	deCtrl = DE_CONTROL_STATUS | DE_CONTROL_LAST_PIXEL |
+	de_ctrl = DE_CONTROL_STATUS | DE_CONTROL_LAST_PIXEL |
 		DE_CONTROL_COMMAND_RECTANGLE_FILL | DE_CONTROL_ROP_SELECT |
 		(rop & DE_CONTROL_ROP_MASK); /* dpr0xc */
 
-	write_dpr(accel, DE_CONTROL, deCtrl);
+	write_dpr(accel, DE_CONTROL, de_ctrl);
 	return 0;
 }
 
···
 	return 0;
 }
 
-static unsigned int deGetTransparency(struct lynx_accel *accel)
+static unsigned int de_get_transparency(struct lynx_accel *accel)
 {
 	unsigned int de_ctrl;
 
···
 		DE_CONTROL_ROP_SELECT | DE_CONTROL_COMMAND_HOST_WRITE |
 		DE_CONTROL_HOST | DE_CONTROL_STATUS;
 
-	write_dpr(accel, DE_CONTROL, de_ctrl | deGetTransparency(accel));
+	write_dpr(accel, DE_CONTROL, de_ctrl | de_get_transparency(accel));
 
 	/* Write MONO data (line by line) to 2D Engine data port */
 	for (i = 0; i < height; i++) {