tests: modem: build_all: Add MG100 board exclusions

Add MG100 board to test exclusions where necessary.

Signed-off-by: Ryan Erickson <[email protected]>

Author: rerickson1

tests/drivers/build_all/modem/testcase.yaml

@@ -9,13 +9,13 @@ tests:
     min_flash: 115
   drivers.modem.ublox_sara.build:
     extra_args: CONF_FILE=modem_ublox_sara.conf
-    platform_exclude: serpente pinnacle_100_dvk litex_vexriscv ip_k66f
+    platform_exclude: serpente pinnacle_100_dvk litex_vexriscv ip_k66f mg100
   drivers.modem.simcom_sim7080.build:
     extra_args: CONF_FILE=modem_simcom_sim7080.conf
-    platform_exclude: serpente pinnacle_100_dvk litex_vexriscv ip_k66f
+    platform_exclude: serpente pinnacle_100_dvk litex_vexriscv ip_k66f mg100
   drivers.modem.quectel_bg9x.build:
     extra_args: CONF_FILE=modem_quectel_bg9x.conf
-    platform_exclude: serpente pinnacle_100_dvk litex_vexriscv ip_k66f
+    platform_exclude: serpente pinnacle_100_dvk litex_vexriscv ip_k66f mg100
     min_ram: 36
   drivers.modem.gsm.build:
     extra_args: CONF_FILE=modem_gsm.conf