net: ipa: avoid setting an undefined field

The GSI channel protocol field in the CH_C_CNTXT_0 GSI register is
widened starting IPA v5.0, making the CHTYPE_PROTOCOL_MSB field
added in IPA v4.5 unnecessary.  Update the code to reflect this.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

drivers/net/ipa/gsi.c

@@ -185,7 +185,7 @@ static u32 ch_c_cntxt_0_type_encode(enum ipa_version version,
 	u32 val;
 
 	val = reg_encode(reg, CHTYPE_PROTOCOL, type);
-	if (version < IPA_VERSION_4_5)
+	if (version < IPA_VERSION_4_5 || version >= IPA_VERSION_5_0)
 		return val;
 
 	type >>= hweight32(reg_fmask(reg, CHTYPE_PROTOCOL));

drivers/net/ipa/gsi_reg.h

@@ -101,7 +101,7 @@ enum gsi_reg_ch_c_cntxt_0_field_id {
 	CHTYPE_DIR,
 	CH_EE,
 	CHID,
-	CHTYPE_PROTOCOL_MSB,				/* IPA v4.9+ */
+	CHTYPE_PROTOCOL_MSB,				/* IPA v4.5-4.11 */
 	ERINDEX,
 	CHSTATE,
 	ELEMENT_SIZE,