arm64: dts: qcom: sdm636-xiaomi-tulip: enable fan53526 buck regulator for LDDR4

[M0Rf30]

From what I've found this regulator is in lavender, clover and tulip schematics.

dmesg:

[   24.306635] fan53555-regulator 1-0060: FAN53555 Option[8] Rev[1] Detected!
[   24.306887] fan53555-reg: Bringing 618750uV into 1000000-1000000uV

i2c-detect:

xiaomi-tulip:~$ sudo i2cdetect -r 1
WARNING! This program can confuse your I2C bus, cause data loss and worse!
I will probe file /dev/i2c-1 using receive byte commands.
I will probe address range 0x08-0x77.
Continue? [Y/n] y
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:                         -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: UU -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

[minlexx]

Also I thought, this is the power to DDR - https://elixir.bootlin.com/linux/v6.11.7/source/arch/arm64/boot/dts/qcom/sdm630-sony-xperia-nile.dtsi#L541

        /* This gives power to the LPDDR4: never turn it off! */
        vreg_l13a_1p8: l13 {

or maybe it can be device specific 🤔