ARM: dts: rockchip: Use ABI name for write protect pin on veyron fievel/tiger

The flash write protect pin is currently named 'FW_WP_AP', which is
how the signal is called in the schematics. The Chrome OS ABI
requires the pin to be named 'AP_FLASH_WP_L', which is also how
it is called on all other veyron devices. Rename the pin to match
the ABI.
Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20200106135142.1.I3f99ac8399a564c88ff48ae6290cc691b47c16ae@changeidSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3288-veyron-fievel.dts

@@ -380,7 +380,11 @@ &gpio7 {
 			  "PWR_LED1",
 			  "TPM_INT_H",
 			  "SPK_ON",
-			  "FW_WP_AP",
+			  /*
+			   * AP_FLASH_WP_L is Chrome OS ABI.  Schematics call
+			   * it FW_WP_AP.
+			   */
+			  "AP_FLASH_WP_L",
 			  "",
 
 			  "CPU_NMI",