ld: Change the name of input section .mmu_data to mmu_tables

The arch/x86/CMakeLists.txt build scripts names five sections that are
generated from .bin files. Two of them are named the same as the .bin
file, and the other three are named inconsistently.

To be consistent, we will rename the three that are named inconistenly
to align with the two that are named as the .bin file.

Being consistent simplifies the system and fosters code-reuse.

This patch renames mmu_tables.

Signed-off-by: Sebastian Bøe <sebastian.boe@nordicsemi.no>

arch/x86/CMakeLists.txt

@@ -174,7 +174,7 @@ if(CONFIG_X86_MMU)
     -I binary
     -B ${OUTPUT_ARCH}
     -O ${OUTPUT_FORMAT}
-    --rename-section .data=.mmu_data
+    --rename-section .data=mmu_tables
     mmu_tables.bin
     mmu_tables.o
     WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}

include/arch/x86/linker.ld

@@ -378,7 +378,7 @@ SECTIONS
 	MMU_PAGE_ALIGN
 	__mmu_tables_start = .;
 	z_x86_kernel_pdpt = .;
-	KEEP(*(.mmu_data));
+	KEEP(*(mmu_tables));
 #ifdef CONFIG_X86_KPTI
 	z_x86_user_pdpt = .;
 	KEEP(*(.user_mmu_data));