tpm: Avoid code bloat when not using EFI_TCG2_PROTOCOL

It does not make sense to enable all SHA algorithms unless they are
needed. It bloats the code and in this case, causes chromebook_link to
fail to build. That board does use the TPM, but not with measured boot,
nor EFI.

Since EFI_TCG2_PROTOCOL already selects these options, we just need to
add them to MEASURED_BOOT as well.

Note that the original commit combines refactoring and new features,
which makes it hard to see what is going on.

Fixes: 97707f12fd tpm: Support boot measurements
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Simon Glass <sjg@chromium.org>

boot/Kconfig

@@ -734,6 +734,10 @@ config LEGACY_IMAGE_FORMAT
 config MEASURED_BOOT
 	bool "Measure boot images and configuration when booting without EFI"
 	depends on HASH && TPM_V2
+	select SHA1
+	select SHA256
+	select SHA384
+	select SHA512
 	help
 	  This option enables measurement of the boot process when booting
 	  without UEFI . Measurement involves creating cryptographic hashes

lib/Kconfig

@@ -438,10 +438,6 @@ config TPM
 	bool "Trusted Platform Module (TPM) Support"
 	depends on DM
 	imply DM_RNG
-	select SHA1
-	select SHA256
-	select SHA384
-	select SHA512
 	help
 	  This enables support for TPMs which can be used to provide security
 	  features for your board. The TPM can be connected via LPC or I2C