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: NJason Wang <wangborong@cdjrlc.com>
Acked-by: NMarkus Mayer <mmayer@broadcom.com>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20211212033347.67921-1-wangborong@cdjrlc.comSigned-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>

drivers/memory/brcmstb_dpfe.c

@@ -424,7 +424,7 @@ static void __finalize_command(struct brcmstb_dpfe_priv *priv)
 
 	/*
 	 * It depends on the API version which MBOX register we have to write to
-	 * to signal we are done.
+	 * signal we are done.
 	 */
 	release_mbox = (priv->dpfe_api->version < 2)
 			? REG_TO_HOST_MBOX : REG_TO_DCPU_MBOX;