i2c: mxc: Print hex instead of decimal for bus address

i2c: mxc: Print hex instead of decimal for bus address

Better to print the hex value for bus address instead of
decimal, for more readbility on bus addressing.

Before:
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U-Boot> i2c dev 1
Setting bus to 1
i2c bus 1 at 35274752, no gpio pinctrl state.

After:
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U-Boot> i2c dev 1
Setting bus to 1
i2c bus 1 at 0x21a4000, no gpio pinctrl state.

Cc: Simon Glass <[email protected]>
Cc: Heiko Schocher <[email protected]>
Cc: Peng Fan <[email protected]>
Cc: Michael Trimarchi <[email protected]>
Signed-off-by: Jagan Teki <[email protected]>
Acked-by: Heiko Schocher <[email protected]>