docs: fix typos and duplicated words across documentation

Fix the following typos and duplicated words:

- admin-guide/pm/intel-speed-select.rst: "weather" -> "whether"
- core-api/real-time/differences.rst: "the the" -> "the"
- admin-guide/bcache.rst: "to to" -> "to"

Signed-off-by: Manuel Cortez <mdjesuscv@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260406030323.1196-1-mdjesuscv@gmail.com>

Documentation/admin-guide/bcache.rst

@@ -618,7 +618,7 @@ cache_replacement_policy
   One of either lru, fifo or random.
 
 freelist_percent
-  Size of the freelist as a percentage of nbuckets. Can be written to to
+  Size of the freelist as a percentage of nbuckets. Can be written to
   increase the number of buckets kept on the freelist, which lets you
   artificially reduce the size of the cache at runtime. Mostly for testing
   purposes (i.e. testing how different size caches affect your hit rate).

Documentation/admin-guide/pm/intel-speed-select.rst

@@ -287,7 +287,7 @@ level.
 Check presence of other Intel(R) SST features
 ---------------------------------------------
 
-Each of the performance profiles also specifies weather there is support of
+Each of the performance profiles also specifies whether there is support of
 other two Intel(R) SST features (Intel(R) Speed Select Technology - Base Frequency
 (Intel(R) SST-BF) and Intel(R) Speed Select Technology - Turbo Frequency (Intel
 SST-TF)).

Documentation/core-api/real-time/differences.rst

@@ -213,7 +213,7 @@ to suspend until the callback completes, ensuring forward progress without
 risking livelock.
 
 In order to solve the problem at the API level, the sequence locks were extended
-to allow a proper handover between the the spinning reader and the maybe
+to allow a proper handover between the spinning reader and the maybe
 blocked writer.
 
 Sequence locks