Revert FRAME_POINTER and ZRAM zstd after deep research

FRAME_POINTER:
- ARM64 Kconfig unconditionally selects FRAME_POINTER (arch/arm64/Kconfig:136)
- Cannot be disabled regardless of defconfig value
- Overhead <1-2% on ARM64 (x29 designated as FP by ABI, STP saves FP+LR
  in single store queue slot)
- Restored to y to match kernel reality

ZRAM compression lzo-rle (reverted from zstd):
- zstd is 3-4x slower than lzo-rle on in-order Cortex-A35
- Estimated: lzo-rle ~350 MB/s vs zstd ~100 MB/s compress on A35
- Each 4KB page swap: 11us (lzo-rle) vs 40us (zstd)
- Under memory pressure during gaming, zstd causes frame stutters
- ROCKNIX deliberately uses lzo-rle on ALL in-order cores (A35/A53/A55)
  and only enables zstd on out-of-order big cores (A73/A76)
- The extra ~500MB virtual capacity from zstd's ratio is not worth the
  latency penalty for latency-sensitive gaming workloads

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

projects/ArchR/devices/RK3326/linux/linux.aarch64.conf

@@ -6721,7 +6721,8 @@ CONFIG_FRAME_WARN=2048
 # CONFIG_DEBUG_SECTION_MISMATCH is not set
 CONFIG_SECTION_MISMATCH_WARN_ONLY=y
 # CONFIG_DEBUG_FORCE_FUNCTION_ALIGN_64B is not set
-# CONFIG_FRAME_POINTER is not set
+CONFIG_ARCH_WANT_FRAME_POINTERS=y
+CONFIG_FRAME_POINTER=y
 # CONFIG_VMLINUX_MAP is not set
 # CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
 # end of Compile-time checks and compiler options

projects/ArchR/devices/RK3326/options

@@ -76,7 +76,7 @@
     DEBUG_TTY="/dev/ttyS2"
 
   # ZRAM Algorithm
-    ZRAM_COMPRESSION_ALGO="zstd"
+    ZRAM_COMPRESSION_ALGO="lzo-rle"
 
   # ZRAM Size
     ZRAM_SWAP_SIZE="512"