[gcc r13-4848] docs: Link to correct section for constraint modifiers

[gcc r13-4848] docs: Link to correct section for constraint modifiers

[Andrew Carlotti]

https://gcc.gnu.org/g:e48864e51d2506cdcf04d5ebb9a17f3a997b65bf

commit r13-4848-ge48864e51d2506cdcf04d5ebb9a17f3a997b65bf
Author: Andrew Carlotti <andrew.carlotti@arm.com>
Date:   Fri Dec 16 15:11:18 2022 +0000

    docs: Link to correct section for constraint modifiers
    
    gcc/ChangeLog:
    
            * doc/md.texi: Fix incorrect pxref.

Diff:
---
 gcc/doc/md.texi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi
index 482e86f15d8..78dc6d72070 100644
--- a/gcc/doc/md.texi
+++ b/gcc/doc/md.texi
@@ -1511,7 +1511,7 @@ operand 1 (meaning it must match operand 0), and @samp{dKs} for operand
 2.  The second alternative has @samp{d} (data register) for operand 0,
 @samp{0} for operand 1, and @samp{dmKs} for operand 2.  The @samp{=} and
 @samp{%} in the constraints apply to all the alternatives; their
-meaning is explained in the next section (@pxref{Class Preferences}).
+meaning is explained in a later section (@pxref{Modifiers}).
 
 If all the operands fit any one alternative, the instruction is valid.
 Otherwise, for each alternative, the compiler counts how many instructions