Double-check fixes: BRIDGE_NETFILTER, BLK_DEBUG_FS, Flycast build type

Kernel:
- BRIDGE_NETFILTER=n (was still =m after BRIDGE was disabled)
- BLK_DEBUG_FS=n (depends on DEBUG_FS which is off, explicit disable)

Flycast:
- Replace sed -Ofast hack with proper CMAKE_BUILD_TYPE=Release
  (CMake Release mode applies -O3 with proper LTO support)

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

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

@@ -784,7 +784,7 @@ CONFIG_BLK_DEV_WRITE_MOUNTED=y
 # CONFIG_BLK_CGROUP_IOPRIO is not set
 CONFIG_BLK_CGROUP_RWSTAT=y
 CONFIG_BLK_ICQ=y
-CONFIG_BLK_DEBUG_FS=y
+# CONFIG_BLK_DEBUG_FS is not set
 # CONFIG_BLK_SED_OPAL is not set
 # CONFIG_BLK_INLINE_ENCRYPTION is not set
 
@@ -1118,7 +1118,7 @@ CONFIG_NET_PTP_CLASSIFY=y
 # CONFIG_NETWORK_PHY_TIMESTAMPING is not set
 CONFIG_NETFILTER=y
 CONFIG_NETFILTER_ADVANCED=y
-CONFIG_BRIDGE_NETFILTER=m
+# CONFIG_BRIDGE_NETFILTER is not set
 
 #
 # Core Netfilter Configuration

projects/ArchR/packages/emulators/standalone/flycast-sa/package.mk

@@ -32,8 +32,7 @@ fi
 
 pre_configure_target() {
   export CXXFLAGS="${CXXFLAGS} -Wno-error=array-bounds"
-  PKG_CMAKE_OPTS_TARGET+=" -DUSE_OPENMP=ON"
-  sed -i 's/\-O[23]/-Ofast/' ${PKG_BUILD}/CMakeLists.txt
+  PKG_CMAKE_OPTS_TARGET+=" -DCMAKE_BUILD_TYPE=Release -DUSE_OPENMP=ON"
 }
 
 makeinstall_target() {