device: Add unit to Kconfig option name: `PRE_GRAPHICS_DELAY_MS`

It’s good practice to put the unit into the name.

Change-Id: I1493f61d4e495c22f09abf1829bb2eab9b1fd2b6
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50517
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>

Documentation/getting_started/kconfig.md

@@ -607,7 +607,7 @@ int <expr> \[if <expr>\]
 
 
 ##### Example:
-    config PRE_GRAPHICS_DELAY
+    config PRE_GRAPHICS_DELAY_MS
         int "Graphics initialization delay in ms"
         default 0
         help

src/device/Kconfig

@@ -117,7 +117,7 @@ config NO_GFX_INIT
 
 endchoice
 
-config PRE_GRAPHICS_DELAY
+config PRE_GRAPHICS_DELAY_MS
 	int "Graphics initialization delay in ms"
 	default 0
 	depends on VGA_ROM_RUN

src/device/pci_device.c

@@ -734,8 +734,8 @@ static int should_load_oprom(struct device *dev)
 
 static void oprom_pre_graphics_stall(void)
 {
-	if (CONFIG_PRE_GRAPHICS_DELAY)
-		mdelay(CONFIG_PRE_GRAPHICS_DELAY);
+	if (CONFIG_PRE_GRAPHICS_DELAY_MS)
+		mdelay(CONFIG_PRE_GRAPHICS_DELAY_MS);
 }
 
 /** Default handler: only runs the relevant PCI BIOS. */

src/mainboard/purism/librem_bdw/Kconfig

@@ -52,7 +52,7 @@ config MAINBOARD_VERSION
 	default "1.0" if BOARD_PURISM_LIBREM13_V1
 	default "2.0" if BOARD_PURISM_LIBREM15_V2
 
-config PRE_GRAPHICS_DELAY
+config PRE_GRAPHICS_DELAY_MS
 	int
 	default 50