Kconfig: switch CONFIG_SYSFS_SYCALL default to n

This odd system call will be removed in the future. Let's decouple it
from CONFIG_EXPERT and switch the default to n as a first step.

Link: https://lore.kernel.org/20250415-dezimieren-wertpapier-9fd18a211a41@brauner
Signed-off-by: Christian Brauner <brauner@kernel.org>

init/Kconfig

@@ -1555,6 +1555,16 @@ config SYSCTL_ARCH_UNALIGN_ALLOW
 	  the unaligned access emulation.
 	  see arch/parisc/kernel/unaligned.c for reference
 
+config SYSFS_SYSCALL
+	bool "Sysfs syscall support"
+	default n
+	help
+	  sys_sysfs is an obsolete system call no longer supported in libc.
+	  Note that disabling this option is more secure but might break
+	  compatibility with some systems.
+
+	  If unsure say N here.
+
 config HAVE_PCSPKR_PLATFORM
 	bool
 
@@ -1599,16 +1609,6 @@ config SGETMASK_SYSCALL
 
 	  If unsure, leave the default option here.
 
-config SYSFS_SYSCALL
-	bool "Sysfs syscall support" if EXPERT
-	default y
-	help
-	  sys_sysfs is an obsolete system call no longer supported in libc.
-	  Note that disabling this option is more secure but might break
-	  compatibility with some systems.
-
-	  If unsure say Y here.
-
 config FHANDLE
 	bool "open by fhandle syscalls" if EXPERT
 	select EXPORTFS