soc: arch: stm32g0: fix strobe init for g070 an g0b0

The STM32G070 and STM32G0B0 Socs don't have USB power delivery support
but the PINs PD0, PD2, PB15, PA8 pins of these still have the same
pull down on boot configuration options as the SOCs with UCPD support.

This commit skips the check if such a peripheral is enabled,
therefore the configuration will always be applied on these SOCs
and the compile error is resolved.

Signed-off-by: Thomas Stranger <thomas.stranger@outlook.com>