pmb/config: fixup zram check options
The main required option - CONFIG_ZRAM - was not checked.
Add it and its direct requirement - CONFIG_ZSMALLOC. See https://cateee.net/lkddb/web-lkddb/ZRAM.html
The other two (ZSMALLOC_STAT, ZRAM_MEMORY_TRACKING) are
for debugging information only. See:
- https://cateee.net/lkddb/web-lkddb/ZSMALLOC_STAT.html (note "If unsure, say N.")
- https://cateee.net/lkddb/web-lkddb/ZRAM_MEMORY_TRACKING.html - also only for getting extended info. Zram itself works without it
Remove them.
Test plan: all kernels still pass pmbootstrap kconfig check
Edited by Alexey Min