Decrease max nodes for NRF52 to 80 as workaround to prevent FS blowouts (#5338)

* Decrease max nodes for NRF52 to 80 as workaround to prevent FS blowouts

* Don't redefine

* Newline

src/mesh/mesh-pb-constants.h

@@ -20,8 +20,12 @@
 
 /// max number of nodes allowed in the mesh
 #ifndef MAX_NUM_NODES
+#ifdef ARCH_NRF52
+#define MAX_NUM_NODES 80
+#else
 #define MAX_NUM_NODES 100
 #endif
+#endif
 
 /// Max number of channels allowed
 #define MAX_NUM_CHANNELS (member_size(meshtastic_ChannelFile, channels) / member_size(meshtastic_ChannelFile, channels[0]))