bcm27xx: bcm2711: correctly disable HW_RANDOM_BCM2835

It was removed in bac74aff5e36, but it should have been disabled.
More info: https://forum.openwrt.org/t/make-image-stops-at-random-number-generator-bcm27xx/91429/7

Fixes: bac74aff5e36 ("bcm27xx: bcm2711: disable HW_RANDOM_BCM2835")
Signed-off-by: Álvaro Fernández Rojas <[email protected]>

target/linux/bcm27xx/bcm2711/config-5.4

@@ -256,6 +256,7 @@ CONFIG_HOLES_IN_ZONE=y
 CONFIG_HOTPLUG_CPU=y
 CONFIG_HW_CONSOLE=y
 CONFIG_HW_RANDOM=y
+# CONFIG_HW_RANDOM_BCM2835 is not set
 CONFIG_HW_RANDOM_IPROC_RNG200=y
 CONFIG_HZ=250
 CONFIG_HZ_250=y