x86/insn-eval: Fix function param name in get_eff_addr_sib()

Change "regoff" to "base_offset" in 2 places in the kernel-doc comments to
prevent warnings:

insn-eval.c:1152: warning: Function parameter or member 'base_offset' not described in 'get_eff_addr_sib'
insn-eval.c:1152: warning: Excess function parameter 'regoff' description in 'get_eff_addr_sib'

Signed-off-by: Randy Dunlap <[e-mail]>
Signed-off-by: Borislav Petkov (AMD) <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/x86/lib/insn-eval.c

···
  * get_eff_addr_sib() - Obtain referenced effective address via SIB
  * @insn:	Instruction. Must be valid.
  * @regs:	Register values as seen when entering kernel mode
- * @regoff:	Obtained operand offset, in pt_regs, associated with segment
+ * @base_offset: Obtained operand offset, in pt_regs, associated with segment
  * @eff_addr:	Obtained effective address
  *
  * Obtain the effective address referenced by the SIB byte of @insn. After
  * identifying the registers involved in the indexed, register-indirect memory
  * reference, its value is obtained from the operands in @regs. The computed
  * address is stored @eff_addr. Also, the register operand that indicates the
- * associated segment is stored in @regoff, this parameter can later be used to
- * determine such segment.
+ * associated segment is stored in @base_offset; this parameter can later be
+ * used to determine such segment.
  *
  * Returns:
  *