lib: fix typos in Kconfig

There are trivial typos in the Kconfig file. Fixed them.
Also, fixed grammar in the descriptions with typos.

Fixes: d56b4b19 ("configs: Migrate RBTREE, LZO, CMD_MTDPARTS, CMD_UBI and CMD_UBIFS")
Fixes: 7264f292 ("spl: fit: Eanble GZIP support for image decompression")
Signed-off-by: Oleksandr Suvorov <oleksandr.suvorov@foundries.io>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

lib/Kconfig

@@ -474,7 +474,7 @@ config LZMA
 config LZO
 	bool "Enable LZO decompression support"
 	help
-	  This enables support for LZO compression algorithm.r
+	  This enables support for the LZO compression algorithm.
 
 config GZIP
 	bool "Enable gzip decompression support"
@@ -533,7 +533,7 @@ config SPL_GZIP
 	bool "Enable gzip decompression support for SPL build"
 	select SPL_ZLIB
 	help
-	  This enables support for GZIP compression altorithm for SPL boot.
+	  This enables support for the GZIP compression algorithm for SPL boot.
 
 config SPL_ZLIB
 	bool