Revert "Revert Deep Sleep due to BLE issues and other random freezes"

This reverts commit addf909287.

furi/core/check.c

@@ -5,6 +5,7 @@
 #include <furi_hal_console.h>
 #include <furi_hal_power.h>
 #include <furi_hal_rtc.h>
+#include <furi_hal_debug.h>
 #include <stdio.h>
 
 #include <FreeRTOS.h>
@@ -117,6 +118,8 @@ FURI_NORETURN void __furi_crash() {
     if(debug) {
         furi_hal_console_puts("\r\nSystem halted. Connect debugger for more info\r\n");
         furi_hal_console_puts("\033[0m\r\n");
+        furi_hal_debug_enable();
+
         RESTORE_REGISTERS_AND_HALT_MCU(true);
     } else {
         furi_hal_rtc_set_fault_data((uint32_t)__furi_check_message);

furi/core/core_defines.h

@@ -24,6 +24,10 @@ extern "C" {
     })
 #endif
 
+#ifndef ABS
+#define ABS(a) ({ (a) < 0 ? -(a) : (a); })
+#endif
+
 #ifndef ROUND_UP_TO
 #define ROUND_UP_TO(a, b)       \
     ({                          \