doc: imx: psb: fix footnotes
authorHeinrich Schuchardt <xypron.glpk@gmx.de>
Sun, 11 Apr 2021 15:03:53 +0000 (17:03 +0200)
committerHeinrich Schuchardt <xypron.glpk@gmx.de>
Sat, 17 Apr 2021 18:01:31 +0000 (20:01 +0200)
commit41ad972426bfcf8ac790bad0d19b4a55af0d230e
tree80951b1ed7e891d42f97d8052b282a50015f3136
parentb0f569ea4df875b3ef350685be6fb25a973e1022
doc: imx: psb: fix footnotes

In reStructured text footnotes are referenced like [1]_.

Add missing underscores.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Acked-by: Marek Vasut <marex@denx.de>
doc/imx/misc/psb.rst