qwt: fix typo in EGL option name

This fixes a typo introduced in commit
a976ee0dc834c56e67e1c832ded00ce23b5ccdb0.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/qwt/Config.in

@@ -22,7 +22,7 @@ config BR2_PACKAGE_QWT_MATHML
 
 config BR2_PACKAGE_QWT_OPENGL
 	bool "OpenGL support"
-	depends on (BR2_PACKAGE_HAS_LIBGLES && BR2_PACKAGE_HAS_LIBEG && BR2_PACKAGE_QT) || \
+	depends on (BR2_PACKAGE_HAS_LIBGLES && BR2_PACKAGE_HAS_LIBEGL && BR2_PACKAGE_QT) || \
 		(BR2_PACKAGE_QT5_GL_AVAILABLE && BR2_PACKAGE_QT5)
 	select BR2_PACKAGE_QT_OPENGL_ES if BR2_PACKAGE_QT
 	select BR2_PACKAGE_QT5BASE_OPENGL_LIB if BR2_PACKAGE_QT5