docs: admin-guide: add kdump documentation into it

The Kdump documentation describes procedures with admins use
in order to solve issues on their systems.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index d0bbca6..9505066 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2057,7 +2057,7 @@
 	  to a memory address not used by the main kernel or BIOS using
 	  PHYSICAL_START, or it must be built as a relocatable image
 	  (CONFIG_RELOCATABLE=y).
-	  For more details see Documentation/kdump/kdump.rst
+	  For more details see Documentation/admin-guide/kdump/kdump.rst
 
 config KEXEC_JUMP
 	bool "kexec jump"
@@ -2094,7 +2094,7 @@
 	  the reserved region.  In other words, it can be set based on
 	  the "X" value as specified in the "crashkernel=YM@XM"
 	  command line boot parameter passed to the panic-ed
-	  kernel. Please take a look at Documentation/kdump/kdump.rst
+	  kernel. Please take a look at Documentation/admin-guide/kdump/kdump.rst
 	  for more details about crash dumps.
 
 	  Usage of bzImage for capturing the crash dump is recommended as