treewide: Remove repeated words

Found by linter

Change-Id: I7a49cce0b56cf83d0e4490733f9190284a314c4a
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72896
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Reviewed-by: Felix Singer <felixsinger@posteo.net>

src/device/oprom/realmode/x86_asm.S

@@ -328,7 +328,7 @@ __intXX_instr = RELOCATED(.)
 
 /* This is the 16-bit interrupt entry point called by the IDT stub code.
  *
- * Before this code code is called, %eax is pushed to the stack, and the
+ * Before this code is called, %eax is pushed to the stack, and the
  * interrupt number is loaded into %al. On return this function cleans up
  * for its caller.
  */