memory: brcmstb_dpfe: fix typo in a comment

The double `to' in the comment in line 427 is repeated. Remove it
from the comment.

Signed-off-by: Jason Wang <wangborong@cdjrlc.com>
Acked-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20211212033347.67921-1-wangborong@cdjrlc.com


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>