Documentation: use capitalization for chapters and acronyms

Use capital letters in acronyms for CD-ROM, FPGA, and PCMCIA.

Use capital letter in the first word of chapter headings for
Locking, Timers, and "Brief tutorial on CRC computation".
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Moritz Fischer <mdf@kernel.org>
Cc: Wu Hao <hao.wu@intel.com>
Cc: Tom Rix <trix@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Will Deacon <will@kernel.org>
Cc: Waiman Long <longman@redhat.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Xu Yilun <yilun.xu@intel.com>
Reviewed-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20230516001518.14514-1-rdunlap@infradead.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/cdrom/index.rst

 .. SPDX-License-Identifier: GPL-2.0
 
-=====
-cdrom
-=====
+======
+CD-ROM
+======
 
 .. toctree::
     :maxdepth: 1

Documentation/fpga/index.rst

 .. SPDX-License-Identifier: GPL-2.0
 
 ====
-fpga
+FPGA
 ====
 
 .. toctree::

Documentation/locking/index.rst

 .. SPDX-License-Identifier: GPL-2.0
 
 =======
-locking
+Locking
 =======
 
 .. toctree::

Documentation/pcmcia/index.rst

 .. SPDX-License-Identifier: GPL-2.0
 
 ======
-pcmcia
+PCMCIA
 ======
 
 .. toctree::

Documentation/staging/crc32.rst

 =================================
-brief tutorial on CRC computation
+Brief tutorial on CRC computation
 =================================
 
 A CRC is a long-division remainder.  You add the CRC to the message,

Documentation/timers/index.rst

 .. SPDX-License-Identifier: GPL-2.0
 
 ======
-timers
+Timers
 ======
 
 .. toctree::