hsdk: readme: Suggest getting pyelftools with pip

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Suggested-by: Yunir Salimzyanov <yunir@synopsys.com>
diff --git a/board/synopsys/hsdk/README b/board/synopsys/hsdk/README
index e29a6a1..9155f17 100644
--- a/board/synopsys/hsdk/README
+++ b/board/synopsys/hsdk/README
@@ -83,10 +83,11 @@
       HSDK board.
 
       Note that Python3 script is used for generation of a header, thus
-      to get that done it's required to have Python3 with elftools installed.
-      On CentOS/RHEL/Fedora this could be installed with:
+      to get that done it's required to have Python3 with "pyelftools" installed.
+
+      "pyelftools" could be installed with help of "pip" even w/o root rights:
       ------------------------->8----------------------
-      sudo dnf install python3-pyelftools
+      python3 -m pip install --user pyelftools
       ------------------------->8----------------------
 
    EXECUTING U-BOOT