misc: eeprom_93xx46: Remove ->prepare() and ->finish() customisation

Currently there is only one way how chip is prepared and unprepared
for an operation. Drop unnecessary customisation.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240508184905.2102633-6-andriy.shevchenko@linux.intel.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>