i2c: fix platform_get_irq.cocci warnings

Remove dev_err() messages after platform_get_irq*() failures.
drivers/i2c/busses/i2c-hix5hd2.c:417:2-9: line 417 is redundant
because platform_get_irq() already prints an error

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>