Make stage 2 entry (after GDT) call driver setup

The driver setup, which in turn calls all the drivers' setup functions
wasn't being called until now. Now, it is included and being called.

The test text which was used to test some display functions in older
revisions is also gone now.

i386/loader/src-asm/entry.asm

@@ -46,9 +46,6 @@ stage_2_setup_entry:
     cli
     hlt
 
-some_text:
-    db "This is some text.", 0x00
-
 ; Utilities
 ; Memory Management
 %include "memory/a20.asm"
@@ -58,13 +55,18 @@ some_text:
 
 bits 32
 stage2_true_entry:
-    mov [dword 0xb8000], byte 'X'
-    mov [dword 0xb8000 + 1], byte 0x31
+    push ebp
+    mov ebp, esp
+    call setup_drivers
+    mov esp, ebp
+    pop ebp
+
     cli
     hlt
 
 %include "utility/math.asm"
 %include "utility/memory.asm"
+%include "utility/display.asm"
 
 ; Driver Manager
-; %include "drivers/manager.asm"
+ %include "drivers/manager.asm"