drivers: gpio: update GPIO register addresses for TI davinci

This commit adds a padding of 0x10 bytes at the beginning of the
`gpio_davinci_regs` structure to correctly align the register
definitions with the actual register layout.

Previously, the DTS had to manually offset the base address by
0x10, introducing a special case in Zephyr's Davinci GPIO driver.
This change eliminates the need for that workaround
Adding the paddingi also help to maintain a similarly with also
to the linux counterpart.

Signed-off-by: Dhruv Menon <dhruvmenon1104@gmail.com>