Remove unnecessary includes from headers

Add to sources, where needed.

mgos_sys_config.h used to pull in a lot of stuff it doesn't need, and many modules depended on it transitively.

CL: none

PUBLISHED_FROM=2c00910bfa3d334025332cedc510b15740230e9e

Author: Deomid Ryabkov

src/esp32/esp32_eth.c

@@ -12,6 +12,8 @@
 
 #include "lwip/ip_addr.h"
 
+#include "common/cs_dbg.h"
+
 #include "mgos_eth.h"
 #include "mgos_net.h"
 #include "mgos_net_hal.h"

src/mgos_eth.c

@@ -10,6 +10,8 @@
 
 #include "lwip/ip_addr.h"
 
+#include "common/cs_dbg.h"
+
 #include "mgos_sys_config.h"
 
 const char *mgos_eth_speed_str(enum mgos_eth_speed speed) {