target: mpc85xx: tl_wdr4900_v1: drop 'fsl_rstcr_restart' hook

Since commit:
7120438e5d

Seems that fsl_rstcr_restart() has been converted
to a reset handler and dropped as hook/callback.

Apply the same to the `tl_wdr4900_v1` target.

Signed-off-by: Alexandru Ardelean <ardeleanalex@gmail.com>

target/linux/mpc85xx/files/arch/powerpc/platforms/85xx/tl_wdr4900_v1.c

@@ -139,7 +139,6 @@ define_machine(tl_wdr4900_v1) {
 	.pcibios_fixup_bus	= fsl_pcibios_fixup_bus,
 #endif
 	.get_irq		= mpic_get_irq,
-	.restart		= fsl_rstcr_restart,
 	.calibrate_decr		= generic_calibrate_decr,
 	.progress		= udbg_progress,
 };