[MIPS] Fix linker script to work for non-4K page size.

    
Very much to my surprise Fuxin Zhang reports this is all it takes to get
the kernel to work for page sizes larger than 4kB.  This also paves the
way for support for the R6000 and R8000 which don't support 4kB page size.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/kernel/vmlinux.lds.S

 #include <linux/config.h>
+#include <asm/asm-offsets.h>
 #include <asm-generic/vmlinux.lds.h>
 
 #undef mips		/* CPP really sucks for this job  */
@@ -64,10 +65,10 @@ SECTIONS
      we can shorten the on-disk segment size.  */
   .sdata     : { *(.sdata) }
 
-  . = ALIGN(4096);
+  . = ALIGN(_PAGE_SIZE);
   __nosave_begin = .;
   .data_nosave : { *(.data.nosave) }
-  . = ALIGN(4096);
+  . = ALIGN(_PAGE_SIZE);
   __nosave_end = .;
 
   . = ALIGN(32);
@@ -76,7 +77,7 @@ SECTIONS
   _edata =  .;			/* End of data section */
 
   /* will be freed after init */
-  . = ALIGN(4096);		/* Init code and data */
+  . = ALIGN(_PAGE_SIZE);		/* Init code and data */
   __init_begin = .;
   .init.text : {
 	_sinittext = .;
@@ -105,7 +106,7 @@ SECTIONS
   .con_initcall.init : { *(.con_initcall.init) }
   __con_initcall_end = .;
   SECURITY_INIT
-  . = ALIGN(4096);
+  . = ALIGN(_PAGE_SIZE);
   __initramfs_start = .;
   .init.ramfs : { *(.init.ramfs) }
   __initramfs_end = .;
@@ -113,7 +114,7 @@ SECTIONS
   __per_cpu_start = .;
   .data.percpu  : { *(.data.percpu) }
   __per_cpu_end = .;
-  . = ALIGN(4096);
+  . = ALIGN(_PAGE_SIZE);
   __init_end = .;
   /* freed after init ends here */