media: qcom: camss: Add missing header bitfield.h

Add the <linux/bitfield.h> header to prevent erros:
>> drivers/media/platform/qcom/camss/camss-vfe-340.c:186:21: error: call to undeclared function 'FIELD_PREP'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
186 | if (bus_status & TFE_BUS_IRQ_MASK_RUP_DONE(i))
| ^
drivers/media/platform/qcom/camss/camss-vfe-340.c:36:40: note: expanded from macro 'TFE_BUS_IRQ_MASK_RUP_DONE'
36 | #define TFE_BUS_IRQ_MASK_RUP_DONE(sc) FIELD_PREP(TFE_BUS_IRQ_MASK_RUP_DONE_MASK, BIT(sc))
| ^
drivers/media/platform/qcom/camss/camss-vfe-340.c:191:21: error: call to undeclared function 'FIELD_PREP'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
191 | if (bus_status & TFE_BUS_IRQ_MASK_BUF_DONE(i))
| ^
drivers/media/platform/qcom/camss/camss-vfe-340.c:38:40: note: expanded from macro 'TFE_BUS_IRQ_MASK_BUF_DONE'
38 | #define TFE_BUS_IRQ_MASK_BUF_DONE(sg) FIELD_PREP(TFE_BUS_IRQ_MASK_BUF_DONE_MASK, BIT(sg))
| ^
2 errors generated.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202509100228.xLeeYzpG-lkp@intel.com/
Signed-off-by: Loic Poulain <loic.poulain@oss.qualcomm.com>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Acked-by: Bryan O'Donoghue <bod@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>