arm64: Remove non-full-va map code

By now the code to only have a single page table level with 64k page
size and 42 bit address space is no longer used by any board in tree,
so we can safely remove it.

To clean up code, move the layerscape mmu code to the new defines,
removing redundant field definitions.

Signed-off-by: Alexander Graf <agraf@suse.de>

arch/arm/include/asm/system.h

@@ -17,19 +17,15 @@
 #define CR_WXN		(1 << 19)	/* Write Permision Imply XN	*/
 #define CR_EE		(1 << 25)	/* Exception (Big) Endian	*/
 
+#ifndef __ASSEMBLY__
+
+u64 get_page_table_size(void);
+#define PGTABLE_SIZE	get_page_table_size()
+
 /* 2MB granularity */
 #define MMU_SECTION_SHIFT	21
 #define MMU_SECTION_SIZE	(1 << MMU_SECTION_SHIFT)
 
-#ifndef __ASSEMBLY__
-
-#ifndef CONFIG_SYS_FULL_VA
-#define PGTABLE_SIZE	(0x10000)
-#else
-u64 get_page_table_size(void);
-#define PGTABLE_SIZE	get_page_table_size()
-#endif
-
 enum dcache_option {
 	DCACHE_OFF = 0x3,
 };