mips: Switch to more portable .org

Binary is unchanged.

grub-core/boot/mips/loongson/fwstart.S

@@ -162,7 +162,7 @@ retry_cs5536:
 
 	b continue
 
-	. = start + GRUB_CPU_LOONGSON_FLASH_TLB_REFILL - GRUB_CPU_LOONGSON_FLASH_START
+	.org GRUB_CPU_LOONGSON_FLASH_TLB_REFILL - GRUB_CPU_LOONGSON_FLASH_START
 tlb_refill:	
 	mfc0 $s1, GRUB_CPU_LOONGSON_COP0_EPC
 	mfc0 $s2, GRUB_CPU_LOONGSON_COP0_BADVADDR
@@ -196,13 +196,13 @@ tlb_refill:
 	b fatal
 	 addiu $a0, $a0, %lo(unhandled_tlb_refill)
 
-	. = start + GRUB_CPU_LOONGSON_FLASH_CACHE_ERROR - GRUB_CPU_LOONGSON_FLASH_START
+	.org GRUB_CPU_LOONGSON_FLASH_CACHE_ERROR - GRUB_CPU_LOONGSON_FLASH_START
 cache_error:
 	lui $a0, %hi(unhandled_cache_error)
 	b fatal
 	 addiu $a0, $a0, %lo(unhandled_cache_error)
 
-	. = start + GRUB_CPU_LOONGSON_FLASH_OTHER_EXCEPTION - GRUB_CPU_LOONGSON_FLASH_START
+	.org GRUB_CPU_LOONGSON_FLASH_OTHER_EXCEPTION - GRUB_CPU_LOONGSON_FLASH_START
 other_exception:
 	mfc0 $s0, GRUB_CPU_LOONGSON_COP0_CAUSE
 	mfc0 $s1, GRUB_CPU_LOONGSON_COP0_EPC

grub-core/boot/mips/startup_raw.S

@@ -39,13 +39,13 @@ start:
 	bal codestart
 	 nop
 base:	
-	. = _start + GRUB_DECOMPRESSOR_MACHINE_COMPRESSED_SIZE
+	.org GRUB_DECOMPRESSOR_MACHINE_COMPRESSED_SIZE
 compressed_size:
 	.long 0
-	. = _start + GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_SIZE
+	.org GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_SIZE
 uncompressed_size:
 	.long 0
-	. = _start + GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_ADDR
+	.org GRUB_DECOMPRESSOR_MACHINE_UNCOMPRESSED_ADDR
 uncompressed_addr:
 	.long 0
 codestart:

grub-core/kern/mips/startup.S

@@ -36,7 +36,7 @@ start:
 	bal cont
 	 nop
 
-	. = _start + GRUB_KERNEL_MACHINE_TOTAL_MODULE_SIZE
+	.org GRUB_KERNEL_MACHINE_TOTAL_MODULE_SIZE
 VARIABLE(grub_total_modules_size)
 	.long 0