configs: always enable thp by default

Change THP policy from 'madvise' to 'always' since we've found it
benefits a lot in most scenarios, e.g. pmbench.
For defrag configuration, it will be initialized to 'madvise'.
Signed-off-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
Acked-by: NCaspar Zhang <caspar@linux.alibaba.com>

config-4.19.y-x86_64

@@ -931,8 +931,8 @@ CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
 CONFIG_MEMORY_FAILURE=y
 CONFIG_HWPOISON_INJECT=m
 CONFIG_TRANSPARENT_HUGEPAGE=y
-# CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not set
-CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
+CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y
+# CONFIG_TRANSPARENT_HUGEPAGE_MADVISE is not set
 CONFIG_ARCH_WANTS_THP_SWAP=y
 CONFIG_THP_SWAP=y
 CONFIG_TRANSPARENT_HUGE_PAGECACHE=y

config-4.19.y-x86_64-debug

@@ -931,8 +931,8 @@ CONFIG_ARCH_SUPPORTS_MEMORY_FAILURE=y
 CONFIG_MEMORY_FAILURE=y
 CONFIG_HWPOISON_INJECT=m
 CONFIG_TRANSPARENT_HUGEPAGE=y
-# CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS is not set
-CONFIG_TRANSPARENT_HUGEPAGE_MADVISE=y
+CONFIG_TRANSPARENT_HUGEPAGE_ALWAYS=y
+# CONFIG_TRANSPARENT_HUGEPAGE_MADVISE is not set
 CONFIG_ARCH_WANTS_THP_SWAP=y
 CONFIG_THP_SWAP=y
 CONFIG_TRANSPARENT_HUGE_PAGECACHE=y