uboot: sunxi: fix compilation failure on orangepizero2 and Bigtreetech cb1

[viraniac]

Description

Fixes compilation issue introduced by u-boot bump. Not sure why this was not caught in the test as I ran building of all allwinner u-boots in a loop. Anyways, now these are getting built correctly

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

• Tested u-boot builds for orangepizero2
• Tested u-boot builds for Bigtreetech cb1

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published in downstream modules

[AGM1968]

Haven't tested, looks correct to me