haswell boards: use libre mrc.bin replacement

courtesy of Angel Pons from the coreboot project

this uses the following patch set from gerrit, as yet
unmerged (in coreboot master) on this date:

    https://review.coreboot.org/c/coreboot/+/64198/5

logic for downloading mrc blobs has been deleted from
lbmk, as this is now completely obsolete (for haswell
boards)

if other platforms are added later that need mrc.bin,
then logic will be re-added again for that

resources/coreboot/haswell/patches/0001-commonlib-clamp.h-Add-more-clamping-functions.patch

@@ -0,0 +1,54 @@
+From dd58f5e9108bc596c93071705d2b53233d13ade6 Mon Sep 17 00:00:00 2001
+From: Angel Pons <th3fanbus@gmail.com>
+Date: Sat, 7 May 2022 20:36:10 +0200
+Subject: [PATCH 01/26] commonlib/clamp.h: Add more clamping functions
+
+Add more clamping functions that work with different types.
+
+Change-Id: I14cf335d5a54f769f8fd9184450957e876affd6b
+Signed-off-by: Angel Pons <th3fanbus@gmail.com>
+---
+ src/commonlib/include/commonlib/clamp.h | 26 +++++++++++++++++--------
+ 1 file changed, 18 insertions(+), 8 deletions(-)
+
+diff --git a/src/commonlib/include/commonlib/clamp.h b/src/commonlib/include/commonlib/clamp.h
+index e01a107ed4..526185195c 100644
+--- a/src/commonlib/include/commonlib/clamp.h
++++ b/src/commonlib/include/commonlib/clamp.h
+@@ -8,15 +8,25 @@
+ /*
+  * Clamp a value, so that it is between a lower and an upper bound.
+  */
+-static inline u32 clamp_u32(const u32 min, const u32 val, const u32 max)
+-{
+-	if (val > max)
+-		return max;
++#define __MAKE_CLAMP_FUNC(type) \
++	static inline type clamp_##type(const type min, const type val, const type max) \
++	{				\
++		if (val > max)		\
++			return max;	\
++		if (val < min)		\
++			return min;	\
++		return val;		\
++	}				\
+ 
+-	if (val < min)
+-		return min;
++__MAKE_CLAMP_FUNC(s8)	/* clamp_s8  */
++__MAKE_CLAMP_FUNC(u8)	/* clamp_u8  */
++__MAKE_CLAMP_FUNC(s16)	/* clamp_s16 */
++__MAKE_CLAMP_FUNC(u16)	/* clamp_u16 */
++__MAKE_CLAMP_FUNC(s32)	/* clamp_s32 */
++__MAKE_CLAMP_FUNC(u32)	/* clamp_u32 */
++__MAKE_CLAMP_FUNC(s64)	/* clamp_s64 */
++__MAKE_CLAMP_FUNC(u64)	/* clamp_u64 */
+ 
+-	return val;
+-}
++#undef __MAKE_CLAMP_FUNC
+ 
+ #endif /* COMMONLIB_CLAMP_H */
+-- 
+2.39.2
+