nrf: nrf52833: use s140 v7.0.1

Previously, we were using v6.1.1 which worked, but was unsupported.
v7.0.1 is the first version of s140 that supports the nRF52833.

Signed-off-by: Sean Cross <[email protected]>

Author: xobs

ports/nrf/mpconfigport.mk

@@ -81,7 +81,7 @@ MCU_VARIANT = nrf52
 MCU_SUB_VARIANT = nrf52833
 
 SD ?= s140
-SOFTDEV_VERSION ?= 6.1.0
+SOFTDEV_VERSION ?= 7.0.1
 
 BOOT_SETTING_ADDR = 0x7F000
 NRF_DEFINES += -DNRF52833_XXAA -DNRF52833