Refactored platform code to use interfaces for patch code with a special feature and improved patch code file names

arm9/source/patches/OffsetToSectorRemapPatchCode.s

@@ -0,0 +1,22 @@
+.cpu arm7tdmi
+.section "offsettosectorremap", "ax"
+.syntax unified
+.thumb
+
+// r0 = rom offset
+// returns sd sector in r0
+// returns remaining sectors in cluster in lr
+.global offset_to_sector_remap
+.type offset_to_sector_remap, %function
+offset_to_sector_remap:
+    push {lr}
+    lsrs r0, r0, #9 // byte address to sector address
+    movs r1, #1
+    mov lr, r1 // read at most 1 sector at a time
+    pop {pc}
+
+.balign 4
+
+.pool
+
+.end