Add gran allocator also to user side in protected build

This is needed for DMA capable memory for fat also in the user side;
the file system doesn't seem to work reliably without.

Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>

platforms/nuttx/src/px4/common/px4_protected_layers.cmake

@@ -2,6 +2,8 @@
 # Build the user side px4_layer
 
 add_library(px4_layer
+	board_dma_alloc.c
+	board_fat_dma_alloc.c
 	tasks.cpp
 	console_buffer_usr.cpp
 	usr_mcu_version.cpp