Keep fused location streaming through GPS rejects

soc/software/gps_system/Makefile

@@ -8,9 +8,11 @@ GPS_DEBUG ?= 1
 GPS_DEBUG_LEVEL ?= 4
 
 # The current Genesys2 Rocket/fabric domain that clocks the UART is 50 MHz.
-# Keep the requested 115200 baud physical rather than producing 57600 baud
-# with the common 100 MHz fallback divider.
+# The 50 Hz fused-location stream plus GPS diagnostics does not fit safely in
+# the polling UART budget at 115200 baud.
 BSP_UART_CLOCK_HZ ?= 50000000
+BSP_UART_BAUDRATE ?= 460800
+BSP_CLINT_TIMEBASE_HZ ?= 500000
 
 # Select one sensor backend, or keep the default read-only WHO_AM_I probe.
 # Accepted values: auto, tdk, st (stm is an alias for st).