rtc: jz4740: Rename vendor-specific DT properties

These properties are never set anywhere within any of the upstream
devicetree files, so I assume I'm not breaking the ABI with this change.

Rename vendor-specific DT properties to have the 'ingenic,' prefix,
which they should have had from the start.

Signed-off-by: Paul Cercueil <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Alexandre Belloni <[e-mail]>

drivers/rtc/rtc-jz4740.c

···
 		if (!pm_power_off) {
 			/* Default: 60ms */
 			rtc->reset_pin_assert_time = 60;
-			of_property_read_u32(np, "reset-pin-assert-time-ms",
+			of_property_read_u32(np,
+					     "ingenic,reset-pin-assert-time-ms",
 					     &rtc->reset_pin_assert_time);
 
 			/* Default: 100ms */
 			rtc->min_wakeup_pin_assert_time = 100;
 			of_property_read_u32(np,
-					     "min-wakeup-pin-assert-time-ms",
+					     "ingenic,min-wakeup-pin-assert-time-ms",
 					     &rtc->min_wakeup_pin_assert_time);
 
 			dev_for_power_off = &pdev->dev;