Documentation: ioctl-number: Update table intro

Introduction paragraph to the ioctl numbers table states that only
ioctls in up to ancient Linux kernel version (v2.6.31) for x86 arch are
listed. This is inaccurate as the table also lists ioctls from non-x86
archs and the kernel is continously developed (currently in v6.x).

Update the paragraph accordingly.

Signed-off-by: Bagas Sanjaya <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
Message-ID: <[email protected]>

Author: bagasme

Documentation/userspace-api/ioctl/ioctl-number.rst

@@ -62,9 +62,8 @@ Following this convention is good because:
 (5) When following the convention, the driver code can use generic
     code to copy the parameters between user and kernel space.
 
-This table lists ioctls visible from user land for Linux/x86.  It contains
-most drivers up to 2.6.31, but I know I am missing some.  There has been
-no attempt to list non-X86 architectures or ioctls from drivers/staging/.
+This table lists ioctls visible from userland, excluding ones from
+drivers/staging/.
 
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