samples: suit: flash_companion: Disable XIP in MSPI driver

XIP access to the external FLASH is not used in this application,
so disable this feature in the MSPI driver to decrease the internal
FLASH footprint.

Signed-off-by: Andrzej Głąbek <[email protected]>

Author: anangl

samples/suit/flash_companion/prj.conf

@@ -17,6 +17,9 @@ CONFIG_GPIO=y
 CONFIG_PINCTRL=y
 CONFIG_FLASH=y
 
+# Disable unused XIP feature in the MSPI driver
+CONFIG_MSPI_XIP=n
+
 # Disable power management
 CONFIG_PM=n