x86/idtentry: Add missing '*' to kernel-doc lines

x86/idtentry: Add missing '*' to kernel-doc lines

Fix kernel-doc warnings by adding the missing '*' to each line.

  Warning: include/asm/idtentry.h:395 bad line:    when raised from kernel mode
  Warning: include/asm/idtentry.h:405 bad line:    when raised from user mode

Since this is in a kernel-doc block, these lines need a leading
" *" on each line to prevent the warnings.

Fixes: a13644f3a53d ("x86/entry/64: Add entry code for #VC handler")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>