dt-bindings: mfd: tps65910: Make interrupt properties optional

Mark 'interrupts', 'interrupt-controller', and 'interrupt-cells' as
optional in the binding schema.

The 'interrupts' property should not be required for the TPS65910 PMIC.
On the AM335x-ICEV2 SoC, there is no hardware connection from the PMIC_INT
pin to the SoC. Without the 'interrupts' property defined, the PMIC cannot
forward interrupts.

Signed-off-by: Shree Ramamoorthy <s-ramamoorthy@ti.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://patch.msgid.link/20251021182716.292652-1-s-ramamoorthy@ti.com


Signed-off-by: Lee Jones <lee@kernel.org>