PowerPC, nand_spl: Add relocation support for -fpic

By rearranging the linker script we get support for
relocation of -fpic for free.
Move __got2_entries outside _GOT2_TABLE_ defining scope
matching the rest of PowerPC

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Acked-by: Scott Wood <scottwood@freescale.com>
Acked-by: Kim Phillips <kim.phillips@freescale.com>

nand_spl/board/freescale/mpc8313erdb/u-boot.lds

@@ -39,8 +39,10 @@ SECTIONS
 		*(.sdata*)
 		_GOT2_TABLE_ = .;
 		KEEP(*(.got2))
-		__got2_entries = (. - _GOT2_TABLE_) >> 2;
+		KEEP(*(.got))
+		PROVIDE(_GLOBAL_OFFSET_TABLE_ = . + 4);
 	}
+	__got2_entries = ((_GLOBAL_OFFSET_TABLE_ - _GOT2_TABLE_) >> 2) - 1;
 
 	. = ALIGN(8);
 	__bss_start = .;

nand_spl/board/freescale/mpc8315erdb/u-boot.lds

@@ -39,8 +39,10 @@ SECTIONS
 		*(.sdata*)
 		_GOT2_TABLE_ = .;
 		KEEP(*(.got2))
-		__got2_entries = (. - _GOT2_TABLE_) >> 2;
+		KEEP(*(.got))
+		PROVIDE(_GLOBAL_OFFSET_TABLE_ = . + 4);
 	}
+	__got2_entries = ((_GLOBAL_OFFSET_TABLE_ - _GOT2_TABLE_) >> 2) - 1;
 
 	. = ALIGN(8);
 	__bss_start = .;

nand_spl/board/sheldon/simpc8313/u-boot.lds

@@ -40,8 +40,10 @@ SECTIONS
 		*(.sdata*)
 		_GOT2_TABLE_ = .;
 		*(.got2)
-		__got2_entries = (. - _GOT2_TABLE_) >> 2;
+		KEEP(*(.got))
+		PROVIDE(_GLOBAL_OFFSET_TABLE_ = . + 4);
 	}
+	__got2_entries = ((_GLOBAL_OFFSET_TABLE_ - _GOT2_TABLE_) >> 2) - 1;
 
 	. = ALIGN(8);
 	__bss_start = .;