cleans up gdt code

kernel/arch/gdt/gdt.s

@@ -1,8 +1,8 @@
 gdtr 	DW 0 ; limit store
 	DD 0 ; base storage
 
-global setGdt
-setGdt:
+global set_gdt
+set_gdt:
 	mov ax, [esp + 4]
 	mov [gdtr], ax
 	mov eax, [esp + 8]
@@ -10,8 +10,8 @@ setGdt:
 	lgdt [gdtr]
 	ret
 
-global reloadSegments
-reloadSegments:
+global reload_segments
+reload_segments:
 	jmp 0x08:.reload_CS ; 0x08 is a stand in for the code segment
 .reload_CS:
 	mov ax, 0x10 ; stand in for the data segment