mediatek: minor fix to eip97 driver

This patch makes the driver work on the newer v2.3 core.

Signed-off-by: John Crispin <john@phrozen.org>

target/linux/mediatek/patches-5.4/0501-crypto-add-eip97-inside-secure-support.patch

@@ -5,11 +5,11 @@
  		writel(val, EIP197_HIA_AIC(priv) + EIP197_HIA_MST_CTRL);
  	}
 +	/*
-+	 * Set maximum number of TX commands to 2^5 = 32 for EIP97 HW2.1
++	 * Set maximum number of TX commands to 2^4 = 16 for EIP97 HW2.1/HW2.3
 +	 */
 +	else {
 +		val = 0;
-+		val |= EIP97_MST_CTRL_TX_MAX_CMD(5);
++		val |= EIP97_MST_CTRL_TX_MAX_CMD(4);
 +		writel(val, EIP197_HIA_AIC(priv) + EIP197_HIA_MST_CTRL);
 +	}