Revert "intel_adsp_ace15_mtpm.conf: temporarily disable CONFIG_MODULES"

This reverts commit 8847de0.

This should now work thanks to the "better" IMR addresses in
zephyrproject-rtos/zephyr#76196

Note the longer term issue is still open:
zephyrproject-rtos/zephyr#76247

Signed-off-by: Marc Herbert <marc.herbert@intel.com>

app/boards/intel_adsp_ace15_mtpm.conf

@@ -86,10 +86,7 @@ CONFIG_MEMORY_WIN_2_SIZE=12288
 
 CONFIG_LLEXT=y
 CONFIG_LLEXT_STORAGE_WRITABLE=y
-
-# temporarily disabled to get MTL working again
-# https://github.com/thesofproject/sof/issues/9308
-CONFIG_MODULES=n
+CONFIG_MODULES=y
 
 # Temporary disabled options
 CONFIG_TRACE=n