wifi: cw1200: restore endian swapping

The code here looks well thought-out, so it seems likely
that the byte-swaps are actually needed, due to SPI bus
and device behaviour. Restore the byte-swapping, in a way
that doesn't result in sparse warnings.

Fixes: 7ceade65 ("wifi: cw1200: fix __le16 sparse warnings")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://msgid.link/20240228121156.62f820aa6dfb.Ia63314e4d0ed1ee76f100846d68f0722abf6b793@changeid

drivers/net/wireless/st/cw1200/cw1200_spi.c

@@ -81,6 +81,9 @@ static int cw1200_spi_memcpy_fromio(struct hwbus_priv *self,
 	pr_info("READ : %04d from 0x%02x (%04x)\n", count, addr, regaddr);
 #endif
 
+	/* Header is LE16 */
+	regaddr = (__force u16)cpu_to_le16(regaddr);
+
 	/* We have to byteswap if the SPI bus is limited to 8b operation
 	   or we are running on a Big Endian system
 	*/
@@ -143,6 +146,9 @@ static int cw1200_spi_memcpy_toio(struct hwbus_priv *self,
 	pr_info("WRITE: %04d  to  0x%02x (%04x)\n", count, addr, regaddr);
 #endif
 
+	/* Header is LE16 */
+	regaddr = (__force u16)cpu_to_le16(regaddr);
+
 	/* We have to byteswap if the SPI bus is limited to 8b operation
 	   or we are running on a Big Endian system
 	*/