arm64: dts: apple: Add bit offset to PMIC NVMEM node names

arm64: dts: apple: Add bit offset to PMIC NVMEM node names

Now that the dt-binding has been extended to allow indicating the bit
position the following warning about a duplicate unit address with W=1
can be fixed:

arch/arm64/boot/dts/apple/t8103.dtsi:764.46-767.8: Warning (unique_unit_address_if_enabled): /soc/spmi@23d0d9300/pmic@f/nvmem-layout/boot-error-count@9f02: duplicate unit-address (also used in node /soc/spmi@23d0d9300/pmic@f/nvmem-layout/panic-count@9f02)

Fixes: d8bf82081c9e ("arm64: dts: apple: Add PMIC NVMEM")
Link: https://lore.kernel.org/r/20250610-nvmem-bit-pattern-v1-2-55ed5c1b369c@kernel.org
Signed-off-by: Sven Peter <sven@kernel.org>