mmc: tmio: give read32/write32 functions more descriptive names

Looking at the backlogs, I am not the only one who missed that the above
functions do not read u32 from one register, but create a virtual u32
from reading to adjacent u16 registers (which depending on 'bus_shift'
can be up to 8 byte apart). Because this driver supports old hardware
for which we don't have documentation, I first wrongly assumed there was
a variant which had a few u32 registers. Let's give the functions more
descriptive names to make it more obvious what is happening.

Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/tmio_mmc.h

@@ -232,7 +232,7 @@ static inline void sd_ctrl_read16_rep(struct tmio_mmc_host *host, int addr,
 	readsw(host->ctl + (addr << host->bus_shift), buf, count);
 }
 
-static inline u32 sd_ctrl_read32(struct tmio_mmc_host *host, int addr)
+static inline u32 sd_ctrl_read16_and_16_as_32(struct tmio_mmc_host *host, int addr)
 {
 	return readw(host->ctl + (addr << host->bus_shift)) |
 	       readw(host->ctl + ((addr + 2) << host->bus_shift)) << 16;
@@ -254,11 +254,10 @@ static inline void sd_ctrl_write16_rep(struct tmio_mmc_host *host, int addr,
 	writesw(host->ctl + (addr << host->bus_shift), buf, count);
 }
 
-static inline void sd_ctrl_write32(struct tmio_mmc_host *host, int addr, u32 val)
+static inline void sd_ctrl_write32_as_16_and_16(struct tmio_mmc_host *host, int addr, u32 val)
 {
 	writew(val, host->ctl + (addr << host->bus_shift));
 	writew(val >> 16, host->ctl + ((addr + 2) << host->bus_shift));
 }
 
-
 #endif